Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
ky dang » ky danh
cac tuc » cac toc, cac tu, cac tac
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
xa dan » ca dan, xa dai, ma dan
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: so sach ((ky dang) OR (ky nang)) ha hoi. lieu va cac tuc ((xa dan) or (va dan)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky dang) OR (ky nang)) ha hoi. lieu va cac tuc ((xa dan) OR (va dan)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky dang) OR (ky nang)) ha hoi. lieu va cac tuc ((xa dan) or (va dan)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dang) OR (ky nang)) ha hoi. lieu va cac tuc ((xa dan) or (va dan)) tai cua tre*.