Perhaps you should try some spelling variations:
thuc ngan » thu ngan, thuc nhan, thuy ngan
huu thuc » cuu thuc, huu phuc, huu thu
cau tren » cu tren, dau tren, cau treo
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hang vi » hang va, hanh vi, hang di
ca tren » cu tren, la tren, co tren
ky huu » ky luu

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 ty xang xa hoi. hieu ky huu thuc ngan hang vi ((ca tren) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty xang xa hoi. hieu ky huu thuc ngan hang vi ((ca tren) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: so sach ty xang xa hoi. hieu ky huu thuc ngan hang vi ((ca tren) or (cau tren))*.