Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
minh hai » minh khai, tinh hai, minh chau
manh hai » lanh hai, thanh hai, van hai
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
sach v » sach va, sach y, sach vay
tuc va » thuc va, truc va, tuc xa
sach 2 » sach y

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 v) or (sach 2)) nang xa hoi. hieu van cam tuc va ((manh hai) OR (minh hai)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang xa hoi. hieu van cam tuc va ((manh hai) OR (minh hai)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) or (sach 2)) nang xa hoi. hieu van cam tuc va ((manh hai) OR (minh hai)) cau treo".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang xa hoi. hieu van cam tuc va ((manh hai) OR (minh hai)) cau treo*.