Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac tuc » cac toc, cac tu, cac tac
cac toi » cac thoi
vai cua » hai cua, lai cua, bai cua
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: tu sach ky dang xa hoi. lieu va ((cac tuc) or (cac toi)) va dan ((vai cua) OR (dai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. lieu va ((cac tuc) OR (cac toi)) va dan ((vai cua) OR (dai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. lieu va ((cac tuc) or (cac toi)) va dan ((vai cua) OR (dai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. lieu va ((cac tuc) or (cac toi)) va dan ((vai cua) OR (dai cua)) viet*.