Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
cho truong » cac truong, thi truong, bo truong
trinh cho » trinh chao, trinh co, trinh chat
doanh bac » doanh bat, doanh ban, danh bac
cong tac » cong ty
doan van » doan va, hoang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - hanh trinh cho truong cong tac ((doanh bac) or (doan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - hanh trinh cho truong cong tac ((doanh bac) OR (doan van)).
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - hanh trinh cho truong cong tac ((doanh bac) or (doan van))*.