Perhaps you should try some spelling variations:
hanh mai » hanh ma, hanh mau, hanh may
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang xa » song xa, lang xa, sang ma
hieu va » lieu va, hieu qua
cam tuc » cam tu, nam thuc, dam thuc
va hanh » van hanh, va thanh, va danh

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 ky sang xa hoi. hieu va ((cam tuc) or (cam xuc)) va hanh mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang xa hoi. hieu va ((cam tuc) OR (cam xuc)) va hanh mai va triet*.