Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
duc ban » duc tan, duc van, dua ban
cuc ban » cua ban, cac ban, cuu ban
van cam » van nam, van lam, van cau
cuu tre » cua tre, cau tren, cau treo
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
vi cuu » vi luu, vinh cuu
te sac » te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te sach)) ky tang xa hoi. hieu van cam ((cuc ban) or (duc ban)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky tang xa hoi. hieu van cam ((cuc ban) OR (duc ban)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky tang xa hoi. hieu van cam ((cuc ban) or (duc ban)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky tang xa hoi. hieu van cam ((cuc ban) or (duc ban)) hanh vi cuu tre*.