Perhaps you should try some spelling variations:
tham soc » cham soc, tham nuoc, thai son
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
dan ky » van ky
soc va » hoc va, loc va, doc va
te dan » te danh, tre dan, ke dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: te dan ky lang ((van hoi) or (van hoc)). hieu va tham soc va hanh vi ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te dan ky lang ((van hoi) OR (van hoc)). hieu va tham soc va hanh vi ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: te dan ky lang ((van hoi) or (van hoc)). hieu va tham soc va hanh vi ((cuu tre) or (cua tre))*.