Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
tieu xanh » tieu danh, chieu xanh, dieu hanh
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
tran van » luan van
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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 - canh ((tranh va) or (tran van)) ((nhung cong) or (dung cong)) san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - canh ((tranh va) OR (tran van)) ((nhung cong) OR (dung cong)) san phan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - canh ((tranh va) or (tran van)) ((nhung cong) or (dung cong)) san phan cau*.