Perhaps you should try some spelling variations:
sach thi » sach thu, sach thieu, sach tham
sach tai » sach bai, sach tham, sach dao
cap nuoc » dat nuoc
nang xa » nang x, lang xa, nang ma
cac luc » cau luc, coc luc, cac nuoc
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach thi) OR (sach tai)) nang xa hoi. hieu qua ((cac luc) OR (cap nuoc)) va danh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach thi) OR (sach tai)) nang xa hoi. hieu qua ((cac luc) or (cap nuoc)) va danh di cua te~".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach thi) OR (sach tai)) nang xa hoi. hieu qua ((cac luc) or (cap nuoc)) va danh di cua te*.