Perhaps you should try some spelling variations:
tham luc » than luc, tham nuoc, tham thuc
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu
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 ty) or (sach tu)) nang x hoi. hieu va tham luc va hanh tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang x hoi. hieu va tham luc va hanh tai cua tu.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) nang x hoi. hieu va tham luc va hanh tai cua tu*.