Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thong xuan » thong luan, thong quang, thong cua
thang cong » thanh cong, thang long, thong cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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 (hieu manh)) - thanh ((thong xuan) or (thong quan)) thang cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh ((thong xuan) OR (thong quan)) thang cong tan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh ((thong xuan) or (thong quan)) thang cong tan than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh ((thong xuan) or (thong quan)) thang cong tan than cap*.