Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » thien van, hieu ve
te sach » toc sach
hieu va » hieu qua
hanh di » hanh vi, hanh de, hang di
cuu ban » cuu van, cua ban, cuu san
cau cuu » cap cuu, cau cua, cau chu
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
di cua » dai cua, doi cua, de cua

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 ky lang xa hoi. ((((hieu van) or (lieu va))) or (hieu va)) cau cuu ban hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. ((((hieu van) OR (lieu va))) OR (hieu va)) cau cuu ban hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. ((((hieu van) or (lieu va))) or (hieu va)) cau cuu ban hanh di cua tre*.