Perhaps you should try some spelling variations:
trinh dong » trinh duong, trinh dung, trinh cong
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 trinh » qua kinh
dong van » duong van, dang van, dong von
chat cac » chat cam, chat cao, cua 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)) - canh tranh qua trinh dong van ((chat cac) or (cho cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh tranh qua trinh dong van ((chat cac) OR (cho cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - canh tranh qua trinh dong van ((chat cac) or (cho cac))*.