Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua dieu
sach doi » sach hoi, sach moi, sach dao
cam tuc » cam xuc, cam tu, nam thuc
hang vi » hang va, hanh vi, hang di
va hang » van hang, va nang, va lang
van cam » van nam, van lam, van cau
sach ly » sach y, sach lo, sach ty
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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 ly) or (sach doi)) nang x hoi. hieu van cam tuc va hang vi ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ly) OR (sach doi)) nang x hoi. hieu van cam tuc va hang vi ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) or (sach doi)) nang x hoi. hieu van cam tuc va hang vi ((cua viet) or (cua vat))*.