Perhaps you should try some spelling variations:
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va
cam luc » cam xuc, cau luc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
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 ky sang tao hoi. ((((hieu ve) OR (hieu van))) 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 ky sang tao hoi. ((((hieu ve) OR (hieu van))) 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 ky sang tao hoi. ((((hieu ve) OR (hieu van))) or (hieu qua)) cam luc va danh vi cua vat*".