Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
cap nang » cam nang, cao nang, ca nang
hanh vai » hanh va, hanh tai, hanh van
cam thuc » am thuc, cam thu, can thuc
sach cap » sach dao, sach bai, sach xa
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach cap nang cao hoi. hieu va ((cam thuc) or (nam thuc)) va ((hanh vai) OR (hanh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach cap nang cao hoi. hieu va ((cam thuc) OR (nam thuc)) va ((hanh vai) OR (hanh vi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach cap nang cao hoi. hieu va ((cam thuc) or (nam thuc)) va ((hanh vai) OR (hanh vi)) va triet".
• Adding a wildcard symbol may retrieve word variants: su sach cap nang cao hoi. hieu va ((cam thuc) or (nam thuc)) va ((hanh vai) OR (hanh vi)) va triet*.