Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cua dan » cua dang, cua ban
van hau » van ha, van hai, van dau
hau tac » khau tai, cau thac, chau bac
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
cuu tre » cua tre, cau tren, cau treo
ca dan » cac dan, ca dao
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 ((ky lang) or (ky tang)) xa hoi. hieu van hau tac ((cua dan) OR (ca dan)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) xa hoi. hieu van hau tac ((cua dan) OR (ca dan)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky tang)) xa hoi. hieu van hau tac ((cua dan) OR (ca dan)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky tang)) xa hoi. hieu van hau tac ((cua dan) OR (ca dan)) vi cuu tre*.