Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
trung va » truong va, trang va, trung ha
hanh vai » hanh vi, hanh va, hanh tai
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
ly nang » ly hang, ly vang, ly quang
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vai ve » va ve, dai ve, vai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ly nang) OR (ky nang)) xa hoi. ((hieu ve) or (hieu qua)) cau trung va hanh vai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu qua)) cau trung va hanh vai ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) OR (ky nang)) xa hoi. ((hieu ve) or (hieu qua)) cau trung va hanh vai ve triet*".