Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
van hoi » van hoc, van hoe, van loi
van cam » van nam, van lam, van cau
cuu ban » cua ban, cuu san, cuu nang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di 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 ((van hoi) OR (van hoa)). hieu van cam ((cuu ban) or (cuu van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ((van hoi) OR (van hoa)). hieu van cam ((cuu ban) OR (cuu van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ((van hoi) OR (van hoa)). hieu van cam ((cuu ban) or (cuu van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ((van hoi) OR (van hoa)). hieu van cam ((cuu ban) or (cuu van)) hanh vi cua tre*.