Perhaps you should try some spelling variations:
sang tao » hang tai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
danh vi » hanh vi, dinh vi, danh di
luc 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 qua)) cam ((luc va) or (duc 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 qua)) cam ((luc va) OR (duc va)) danh 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) or (duc va)) danh vi cua vat*.