Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hang luc » nang luc, hang luan, hang truc
ban hang » ngan hang
toc sach » hoc sach, doc sach, thuoc sach
hieu ban » hieu van, dieu ban, lieu ban
va hanh » va thanh, va danh, ban hanh
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vai cua » dai cua, hai cua, lai cua
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: toc sach v ((nang xa) OR (nang ma)) hoi. hieu ban hang luc ((va hanh) or (van hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v ((nang xa) OR (nang ma)) hoi. hieu ban hang luc ((va hanh) OR (van hanh)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v ((nang xa) OR (nang ma)) hoi. hieu ban hang luc ((va hanh) or (van hanh)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach v ((nang xa) OR (nang ma)) hoi. hieu ban hang luc ((va hanh) or (van hanh)) vai cua triet*.