Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
can thuc » dan thuc, van thuc, cay thuc
lang hai » lang chai, lang thai, lang ha
hang cau » hang dau, hang ca, nhung cau
hieu van » hieu va, thien van, lieu va
hai cau » hai chau, hai chu, hai hau
va lang » va nang, hoa lang
cam thu » nam thu, cac thu, ca thu
so sach » so sanh, bo sach, co sach
ly hang » ly quang
su sach » vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (su sach)) ly hang cau hoi. hieu van ((can thuc) or (cam thu)) va lang hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (su sach)) ly hang cau hoi. hieu van ((can thuc) OR (cam thu)) va lang hai cau treo.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (su sach)) ly hang cau hoi. hieu van ((can thuc) or (cam thu)) va lang hai cau treo*.