Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cham tuc » nham thuc, pham thuc, tham thuc
qua cham » qua hai, qua cac, va cham
hang vi » hang va, hanh vi, hang di
va hang » van hang, va nang, va lang
te sach » toc sach
tu nong » tu dong, tu cong, tu tong
tu nang » tru nang, tu nano, tu lang
tuc va » thuc va, truc va, tuc xa
vi va » vi van, vai va, vu 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 sach ((((tu nang) or (tu nong))) or (truc nano)) o hoi. hieu qua cham tuc va hang vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((tu nang) OR (tu nong))) OR (truc nano)) o hoi. hieu qua cham tuc va hang vi va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((((tu nang) or (tu nong))) or (truc nano)) o hoi. hieu qua cham tuc va hang vi va triet*.