Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, lieu va, hieu ve
te sach » toc sach
bo sach » co sach, hoc sach
cao dua » cao duc, ca dua, cay dua
dua ban » dia ban, cua ban, qua ban
lam cua » nam cua, lam chat
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) or (bo sach)) ky nang x ho. ((hieu van) or (thien van)) cao dua ban thanh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (bo sach)) ky nang x ho. ((hieu van) OR (thien van)) cao dua ban thanh lam cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (bo sach)) ky nang x ho. ((hieu van) or (thien van)) cao dua ban thanh lam cua te*.