Perhaps you should try some spelling variations:
sang tao » hang tai
te sach » toc sach
cam luc » cam xuc, cau luc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
va dan » ca dan, va dau, va dap
va dao » ca 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: te sach ky sang tao hoi. ((hieu ve) or (hieu qua)) cam luc ((va dan) OR (va dao)) 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 qua)) cam luc ((va dan) OR (va dao)) 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 qua)) cam luc ((va dan) OR (va dao)) vi cua vat".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang tao hoi. ((hieu ve) or (hieu qua)) cam luc ((va dan) OR (va dao)) vi cua vat*.