Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
cao hoi » cau hoi, co hoi, cao hoc
cac xuc » cam xuc, cac nuoc, chat xuc
dan con » day con, dan mon, dan bon
con cua » cong cua, co cua, dong cua
cua cau » cua cac, cua chu, cua cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sang ky nang cao hoi. hieu vien ((((cac xuc) or (dat nuoc))) or (chao xu)) cac dan con cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sang ky nang cao hoi. hieu vien ((((cac xuc) OR (dat nuoc))) OR (chao xu)) cac dan con cua cau.
• Adding a wildcard symbol may retrieve word variants: so sang ky nang cao hoi. hieu vien ((((cac xuc) or (dat nuoc))) or (chao xu)) cac dan con cua cau*.