Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh cac » hanh cac, thanh bac, thanh ca
va thanh » gia thanh, ban thanh, va tinh
cau phuc » cau truc, chau phu, huu phuc
sach ky » sac ky, sach y, sach ty
cac cua » cach cua, cac qua, ca cua
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang ((ma hoi) OR (ma hoa)). hieu va ((cau phuc) or (chau au)) va thanh cac cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ((ma hoi) OR (ma hoa)). hieu va ((cau phuc) OR (chau au)) va thanh cac cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ((ma hoi) OR (ma hoa)). hieu va ((cau phuc) or (chau au)) va thanh cac cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((ma hoi) OR (ma hoa)). hieu va ((cau phuc) or (chau au)) va thanh cac cua triet*.