Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
hien xanh » hien hanh, hien nhanh, chieu xanh
canh tran » canh tranh, hanh trang, banh trang
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
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: hoc hien xanh - canh tran van ((((thong cong) OR (tong cong))) or (dung cong)) doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh tran van ((((thong cong) OR (tong cong))) OR (dung cong)) doan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh tran van ((((thong cong) OR (tong cong))) or (dung cong)) doan phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tran van ((((thong cong) OR (tong cong))) or (dung cong)) doan phan tu*.