Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
van chat » cao chat
va hanh » van hanh, va thanh, va danh
san ky » sang ky, van ky, ban ky
nang o » nang co, nang ho, nang ro
dan ky » van ky
tuc va » thuc va, truc va, tuc xa
dai va » mai va
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((san ky) or (dan ky)) nang o hoi. hieu ((va cac) or (van chat)) tuc va hanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((san ky) OR (dan ky)) nang o hoi. hieu ((va cac) OR (van chat)) tuc va hanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: te ((san ky) or (dan ky)) nang o hoi. hieu ((va cac) or (van chat)) tuc va hanh dai va triet*.