Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
cac truc » cau truc, cac tru, cac trung
ban hanh » ban hang
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sach v » sach va, sach y, sach 2

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