Perhaps you should try some spelling variations:
trong thanh » truong thanh, trung thanh, rong thanh
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh qua » tranh cua, thanh qua, trinh qua
qua dung » quang dung, su dung, qua song
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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)) - canh tranh qua dung trong thanh ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh tranh qua dung trong thanh ((phan cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - canh tranh qua dung trong thanh ((phan cau) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - canh tranh qua dung trong thanh ((phan cau) or (phan dau))*.