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 hoc » van hoa
van hoi » van hoa, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
san ky » sang ky, van ky, dan ky
soc va » hoc va, loc va, doc va
te san » te ban, ke san, tu 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 san ky lang ((van hoi) OR (van hoc)). 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 san ky lang ((van hoi) OR (van hoc)). 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 san ky lang ((van hoi) OR (van hoc)). hieu van tham soc va hanh vi ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te san ky lang ((van hoi) OR (van hoc)). hieu van tham soc va hanh vi ((cuu tre) or (cua tre))*.