Perhaps you should try some spelling variations:
sang tao » hang tai
te sach » toc sach
cam luc » cam xuc, cau luc
ty sang » ty xang, ty hang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu van
danh vi » hanh vi, dinh vi, danh di
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
va danh » va dinh, va dan, va hanh
luc va » duc va, tuc va, loc 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: te sach ty sang tao hoi. ((((hieu ve) OR (hieu va))) or (hieu qua)) cam luc va danh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty sang tao hoi. ((((hieu ve) OR (hieu va))) OR (hieu qua)) cam luc va danh 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 va))) or (hieu qua)) cam luc va danh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: te sach ty sang tao hoi. ((((hieu ve) OR (hieu va))) or (hieu qua)) cam luc va danh vi cua vat*.