Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
nang van » dang van, tang van, lang van
cam thuc » am thuc, nam thuc, can thuc
va hanh » van hanh, va thanh, va danh
cam thu » nam thu, cac thu, ca thu
tu sach » thu sach, su sach, tu cach
van hoi » van hoa, van hoc, van hoe
te sach » toc sach
hieu va » lieu va, hieu qua

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