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
vang tuan » van tuan, vong tuan, quang tuan
tinh cua » trinh cua, sinh cua, tranh cua
tuan cao » toan cao, juan cao, quang cao

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 - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) vang tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) OR (thong cong)) vang tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) vang tuan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tinh cua) OR (tinh chat)) ((nhung cong) or (thong cong)) vang tuan cao*.