Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
vang thanh » van thanh, dang thanh, tang thanh
thanh chau » thanh cha, thanh cham, thanh chu
tieu xanh » tieu danh, chieu xanh, dieu hanh
cong vang » cong lang, cong quang, cong ngang
trang va » hang va
tran 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: theo tieu xanh - thanh ((trang va) or (tran van)) nhung cong vang thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - thanh ((trang va) OR (tran van)) nhung cong vang thanh chau.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh ((trang va) or (tran van)) nhung cong vang thanh chau*.