Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
tham hoc » thai hoc, tham hoa, than hoc
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ve cac » va cac, vien cac

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

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