Perhaps you should try some spelling variations:
thong thuong » thong thong, hang thuong, cong thuong
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien danh
thong cong » trong cong, tong cong, thong thong
thien anh » thien danh, tien anh, thien thanh
trung cap » truong cao, trung tam
dan van » dang van, doan van, dao 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 ((thieu xanh) OR (thien anh)) - thanh trung cap ((thong thuong) or (thong cong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh trung cap ((thong thuong) OR (thong cong)) dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - thanh trung cap ((thong thuong) or (thong cong)) dan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - thanh trung cap ((thong thuong) or (thong cong)) dan van ban*.