Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, v nang, may nang
vai va » mai va, dai va, hai va
ve cam » ve cham, ve cac, va cam

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) or (ly nang)) ma hoi. hieu ve cam tuc ((va hanh) OR (va danh)) vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) ma hoi. hieu ve cam tuc ((va hanh) OR (va danh)) vai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ly nang)) ma hoi. hieu ve cam tuc ((va hanh) OR (va danh)) vai va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) ma hoi. hieu ve cam tuc ((va hanh) OR (va danh)) vai va triet*.