Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
trong thuat » trong hoat, trong thu, trong phat
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu xanh » chieu sach, chieu sang, chieu tinh
thuat bang » thuat ban, thuat mang, thuat nang
bang cong » dang cong, bang song, hang cong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang 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: doc ((hieu nganh) or (chieu xanh)) - thanh trong thuat bang cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (chieu xanh)) - thanh trong thuat bang cong tan van ban*.