Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
luc ngan » luc nganh, luc nhan, luat ngan
ca tren » cau tren, la tren, co tren
hang vi » hang va, hanh vi, hang di
cau luc » cau truc, cau phuc
sach ty » sach y, sach tu, sach thu
cu tren » tu tren, dua tren
hieu ve » hieu va, hieu van
long ha » dong ha, cong ha, dong hoa
ang xa » lang xa, mang xa, dang xay
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((ang xa) or (long ha)) hoi. hieu ve cau luc ngan hang vi ((ca tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((ang xa) OR (long ha)) hoi. hieu ve cau luc ngan hang vi ((ca tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((ang xa) or (long ha)) hoi. hieu ve cau luc ngan hang vi ((ca tren) or (cu tren))*.