Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach bai » sach dao, cac bai, sach xa
thanh vi » hanh vi, thanh va, thanh ve
sach thi » sach thu, sach tai, sach thieu
hieu van » hieu va, thien van, lieu va
luc ban » duc ban, cuc ban, luc bat
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
vi cua » vai cua, di cua
cua te » cua tu

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 thi) or (sach bai)) ((nang xa) or (sang ma)) hoi. hieu van cam luc ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thi) OR (sach bai)) ((nang xa) OR (sang ma)) hoi. hieu van cam luc ban thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: te ((sach thi) or (sach bai)) ((nang xa) or (sang ma)) hoi. hieu van cam luc ban thanh vi cua te*.