Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac truc » cau truc, cac tru, cac trung
van hanh » van thanh, ban hanh, van anh
vai cua » dai cua, hai cua, lai cua
va hanh » va thanh, va danh, ban hanh
su sach » so sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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