Perhaps you should try some spelling variations:
dai trong » tai trong, bai trong, dai tuong
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
luc ngan » luc nganh, luc nhan, luat ngan
hang vi » hang va, hanh vi, hang di
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cau » ke cau, va cau, ve cac
vi dai » si dai, li dai, vien dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thu) or (sach thue)) ((nang xa) OR (nang ma)) hoi. hieu ve cau luc ngan hang vi dai trong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thue)) ((nang xa) OR (nang ma)) hoi. hieu ve cau luc ngan hang vi dai trong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) or (sach thue)) ((nang xa) OR (nang ma)) hoi. hieu ve cau luc ngan hang vi dai trong".
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) or (sach thue)) ((nang xa) OR (nang ma)) hoi. hieu ve cau luc ngan hang vi dai trong*.