Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh van » tran van, trinh van, tranh ban
thanh van » thanh san, thanh toan, thanh phan
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - canh ((tranh van) OR (thanh van)) ((nhung cong) or (thong cong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((tranh van) OR (thanh van)) ((nhung cong) OR (thong cong)) dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh ((tranh van) OR (thanh van)) ((nhung cong) or (thong cong)) dan phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((tranh van) OR (thanh van)) ((nhung cong) or (thong cong)) dan phan tu*.