Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
ky dang » ky danh
cac tuc » cac toc, cac tu, cac tac
dan hai » doan hai, dang hai, dan khai
hai cua » thai cua, dai cua, hoi cua
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky dang) or (ky nang)) xa hoi. lieu va cac tuc va dan hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky dang) OR (ky nang)) xa hoi. lieu va cac tuc va dan hai cua viet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky dang) or (ky nang)) xa hoi. lieu va cac tuc va dan hai cua viet*.