Perhaps you should try some spelling variations:
tao khoi » thao khoa, lao khoa, tao boi
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam luc » cam xuc, cau luc
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
tao hoi » tao boi, tay hoi, thao hoc
ky sang » ky nang, ky dang, ky tang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang ((tao hoi) OR (tao khoi)). ((hieu va) OR (lieu va)) 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) OR (tao khoi)). ((hieu va) or (lieu va)) cam luc va danh vi cua vat~".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ((tao hoi) OR (tao khoi)). ((hieu va) or (lieu va)) cam luc va danh vi cua vat*.