Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
toan phan » thanh phan, toan ban, hoa phan
hoc tran » hoc tan, hoc tren, boc tran
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tran quang - hanh trinh cua ((hang cong) or (dung cong)) ((dan phan) or (toan phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tran quang - hanh trinh cua ((hang cong) OR (dung cong)) ((dan phan) OR (toan phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc tran quang - hanh trinh cua ((hang cong) or (dung cong)) ((dan phan) or (toan phan)) cau*.