Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
hoc dien » hoc hien, hoc vien, hoc dieu
dien dan » hien dai, vien dai, gian dan
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dien dan - ((hanh tang) or (thanh trung)) cua nhung cong tan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien dan - ((hanh tang) OR (thanh trung)) cua nhung cong tan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc dien dan - ((hanh tang) or (thanh trung)) cua nhung cong tan than tap*.