Perhaps you should try some spelling variations:
te sach » toc sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
hoc anh » hoc nganh, hoc nhanh, ngoc anh
cuu tre » cau tren, cau treo
ve cao » va cao, ve bao, ve cac

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) or (hoc anh)) ky dang xa hoi. hieu ve cao duc va hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc anh)) ky dang xa hoi. hieu ve cao duc va hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc anh)) ky dang xa hoi. hieu ve cao duc va hanh vi ((cua tre) or (cuu tre))*.