Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thu sach » thuat sach, thuoc sach, thu hoach
minh hai » minh khai, tinh hai, manh hai
luc cham » luc tham, tuc cham, phuc cham
hieu luc » hieu luat, hieu qua
hai cua » thai cua, dai cua, hoi cua
va minh » van minh, vua minh, va kinh
tu sach » su sach, tu cach, vu sach
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
soc va » hoc va, loc va, doc va

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))) or (te sach)) ky tang xa hoi. hieu luc cham soc va minh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (te sach)) ky tang xa hoi. hieu luc cham soc va minh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thu sach))) or (te sach)) ky tang xa hoi. hieu luc cham soc va minh hai cua viet*.