Perhaps you should try some spelling variations:
sang tao » hang tai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va hanh, dia danh
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ty sang » ty xang, ty hang, duy sang
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty sang tao hoi. ((hieu ve) OR (hieu qua)) cam luc ((va danh) OR (va dan)) vi cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty sang tao hoi. ((hieu ve) or (hieu qua)) cam luc ((va danh) OR (va dan)) vi cua vat~".
• Adding a wildcard symbol may retrieve word variants: te sach ty sang tao hoi. ((hieu ve) or (hieu qua)) cam luc ((va danh) OR (va dan)) vi cua vat*.