Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » thanh va, thanh ve, nhanh vi
cau tren » dau tren, ca tren, cau treo
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
cu tren » tu tren, dua tren
y xang » ty xang
va cau » van cau, va cac, va dau

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 y xang xa hoi. hieu va cau duc va ((thanh vi) or (hanh vi)) ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y xang xa hoi. hieu va cau duc va ((thanh vi) OR (hanh vi)) ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach y xang xa hoi. hieu va cau duc va ((thanh vi) or (hanh vi)) ((cau tren) or (cu tren))*.