Help: How to use keywords

When you search for the word "cat", that includes plural "cats" and synonyms like "kitten", "pussycat" etc.
If one had the money to complete the dictionary.

It includes:

Automatic correction of misspellings and phonetics

Multilingual translation. Type citty => get city

When you search fot the syllable "cat", that includes all words with the embedded syllable "cat".

Examples:
Cathedral, Alcatraz, advocat, Yucatan, catfood, catcher etc.

Spellcorrection does not correct syllables.
There is not yet a foreign language syllable search.

The keyword dog           shows  284 pictures with a dog
The keyword cat             shows  391 pictures with a cat
The keyword dog cat     shows    13 pictures with a dog AND a cat
The keyword dog or cat shows 662 pictures with a dog  OR  a cat

Your range of opportunities in the internet - including money - depends on your knowledge of words and their meanings.
Some people use not more than 5.000 words. The very sophisticated persons 100.000. Shakespeare used 250.000.

The search engines are the heart of the internet. Visipix.com spent about 50.000 hours of R+D on that problem and sold 3 million of the resulting programs.
1983 Hannes Keller demonstrated on a Commodore PET his real time translator from typed Swiss German to synthesised Japanese speech.