Perhaps you should try some spelling variations:
sach ly » sach y, sach lo, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
va cao » va cac, va co, va dao
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: tu sach ly nang cao hoi. hieu va cao tuc ((va hanh) or (va danh)) ((vi cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang cao hoi. hieu va cao tuc ((va hanh) OR (va danh)) ((vi cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang cao hoi. hieu va cao tuc ((va hanh) or (va danh)) ((vi cua) or (dai cua)) triet*.