Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
nam tu » nam thuc
ma hoi » mai hoi, ma hoa, me hoi
va ve » va de, va le, va vi

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 ky nang ((ma hoi) or (xa hoi)). hieu ve ((nam tu) or (nam thu)) va hanh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve ((nam tu) OR (nam thu)) va hanh va ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (xa hoi)). hieu ve ((nam tu) or (nam thu)) va hanh va ve triet*.