Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
cuong cong » cong cong, luong cong, duong cong
tran xuan » tran quang, tran van
dung cong » dung trong
dan khoan » dan khoa, dai khoang, toan khoan
hoc dieu » hoc thieu, hoc hien
khoan va » doan va, khoa ma, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu hanh - thanh tran xuan ((cuong cong) or (dung cong)) dan khoan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - thanh tran xuan ((cuong cong) OR (dung cong)) dan khoan va*.