Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tham soc » cham soc, tham nuoc, thai son
van tham » van thanh, van tuan, van chat
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
soc va » hoc va, loc va, doc va
te ban » te bao

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

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