Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
tang hoc » nang hoc, tang ho, bang hoc
tu sach » su sach, te sach, tu cach
doi cua » dai cua, hoi cua
xuc van » duc van, luc van, vuc van
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
hoc hoi » hoc khoi, hoc hoa, hoc noi
ky tang » ky nang, ky dang, kho tang
di cua » dai cua, de cua, do cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ky tang hoc hoi. hieu su cham xuc van hanh ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky tang hoc hoi. hieu su cham xuc van hanh ((di cua) OR (doi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky tang hoc hoi. hieu su cham xuc van hanh ((di cua) or (doi cua)) tre*.