Perhaps you should try some spelling variations:
nang phat » nang suat, van phat
nang chat » nang cham, nang cao, nang suat
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
tuc va » truc va, tuc xa, duc va
vi va » vi van, vai va, vu va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang chat) or (nang phat)) hoc. hieu ve cham ((tuc va) or (thuc va)) hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang chat) OR (nang phat)) hoc. hieu ve cham ((tuc va) OR (thuc va)) hanh vi va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang chat) or (nang phat)) hoc. hieu ve cham ((tuc va) or (thuc va)) hanh vi va thiet*.