Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
van cham » van chat, van tham, va cham
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
sach thu » sach thieu, sach tham, cach thuc
cham duc » pham duc, cham soc, pham duy
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
dang xa » dang xay, lang xa, dang ha
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thu) or (sach thue)) dang xa hoi. hieu van cham duc ban hanh vai ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thue)) dang xa hoi. hieu van cham duc ban hanh vai ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) or (sach thue)) dang xa hoi. hieu van cham duc ban hanh vai ((cua tre) or (cua tu))*.