Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham tuc » nham thuc, pham thuc, tham thuc
thi nang » thi cong, ki nang, thi hanh
van hanh » van thanh, ban hanh, van anh
vai cua » dai cua, hai cua, lai cua
va hanh » va thanh, va danh, ban hanh
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) thi nang xa hoi. hieu ve cham tuc ((va hanh) OR (van hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thi nang xa hoi. hieu ve cham tuc ((va hanh) OR (van hanh)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) thi nang xa hoi. hieu ve cham tuc ((va hanh) OR (van hanh)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) thi nang xa hoi. hieu ve cham tuc ((va hanh) OR (van hanh)) vai cua triet*.