Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cham xuc » cam xuc, chat xuc, cham soc
thu sach » thuat sach, thuoc sach, thu hoach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tu sach » su sach, te sach, tu cach
ky tang » ky nang, ky dang, kho tang
hoa hoi » khoa hoi, hoa hoc, hoa doi
ha hoi » ha noi, xa hoi, va hoi
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan 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: ((tu sach) or (thu sach)) ky tang ((ha hoi) or (hoa hoi)). hieu va cham xuc va dan vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky tang ((ha hoi) OR (hoa hoi)). hieu va cham xuc va dan vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky tang ((ha hoi) or (hoa hoi)). hieu va cham xuc va dan vi cua viet*.