Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
va hanh » van hanh, va thanh, va danh
ca hoi » cau hoi, cua hoi, co hoi
va cao » va cac, va co, va dao
suc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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 ly hang ((ca hoi) or (xa hoi)). hieu va cao suc va hanh ((vi cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly hang ((ca hoi) OR (xa hoi)). hieu va cao suc va hanh ((vi cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly hang ((ca hoi) or (xa hoi)). hieu va cao suc va hanh ((vi cua) or (dai cua)) triet*.