Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » dau tren, ca tren, cau treo
cau phuc » cau truc, chau phu, huu phuc
sach ty » sach y, sach tu, sach thu
hang vi » hang va, hanh vi, hang di
cu tren » tu tren, dua tren
cau luc » cau truc
hieu ve » hieu va, hieu van
mang xa » lang xa, mang may, dang xay
ty mang » ty xang, ty hang, tin mang

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 mang xa hoi. hieu ve ((cau luc) or (cau phuc)) ngan hang vi ((cau tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty mang xa hoi. hieu ve ((cau luc) OR (cau phuc)) ngan hang vi ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty mang xa hoi. hieu ve ((cau luc) or (cau phuc)) ngan hang vi ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty mang xa hoi. hieu ve ((cau luc) or (cau phuc)) ngan hang vi ((cau tren) OR (cu tren))*.