Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
cuu ban » cua ban, cuu san, cuu nang
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang

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