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
cam thuc » am thuc, nam thuc, can thuc
manh hai » lanh hai, thanh hai, van hai
cam thu » nam thu, cac thu, ca thu
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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

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