Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » thien van, lieu va, hieu ve
thanh vi » hanh vi, thanh va, thanh ve
sach tu » sach thu, cach tu, sach ty
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
doc ban » duoc ban, do ban, doi ban
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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 y) or (sach tu)) dang xa hoi. ((hieu van) or (hieu va)) than doc ban thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach y) OR (sach tu)) dang xa hoi. ((hieu van) OR (hieu va)) than doc ban thanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach y) or (sach tu)) dang xa hoi. ((hieu van) or (hieu va)) than doc ban thanh vi cuu tre*.