Perhaps you should try some spelling variations:
sach khien » sach khuyen, sach thieu, sach tien
khien bang » phien ban, khien dong
cau treo » cau theo, cau tren, cau triet
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
va kinh » va tinh, qua kinh
su sach » so sach, vu sach
va dinh » van dinh, va tinh, vu dinh
van cam » van nam, van lam, van cau
bang xa » lang xa, bang va, mang xa

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 khien bang xa hoi. hieu van cam xuc ((va dinh) or (va kinh)) vi ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach khien bang xa hoi. hieu van cam xuc ((va dinh) OR (va kinh)) vi ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: su sach khien bang xa hoi. hieu van cam xuc ((va dinh) or (va kinh)) vi ((dua tren) or (cau treo))*.