Perhaps you should try some spelling variations:
thanh tung » thanh cong
thuong dan » huong dan, thuong han, thuong dam
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, suat thong
cua tong » cua cong, cua dong, cua nong
dan toan » van toan, dan than, manh toan
toan ban » van ban

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 - ((thanh trung) or (thanh tung)) ((cua thong) OR (cua tong)) thuong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((thanh trung) OR (thanh tung)) ((cua thong) OR (cua tong)) thuong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((thanh trung) or (thanh tung)) ((cua thong) OR (cua tong)) thuong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh trung) or (thanh tung)) ((cua thong) OR (cua tong)) thuong dan toan ban*.