Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dao vai » dao va, dao bai, dao hai
dao van » do van, dang van
va am » va lam, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((xa hoi) OR (x ho)). hieu va am thuc va ((dao vai) OR (dao van)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((xa hoi) or (x ho)). hieu va am thuc va ((dao vai) OR (dao van)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((xa hoi) or (x ho)). hieu va am thuc va ((dao vai) OR (dao van)) cua triet*.