Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du

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