Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va danh, ban hanh
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu ve cac tac ((va hanh) or (va thanh)) lai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve cac tac ((va hanh) OR (va thanh)) lai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu ve cac tac ((va hanh) or (va thanh)) lai ((cua triet) OR (va triet))*".