Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
thieu xanh » chieu xanh, thien anh, thien danh
nguong dan » huong dan
hieu manh » chieu xanh, hieu nganh, dieu hanh
han thang » han chang, nhanh thang, thanh thang
van thang » van thanh, van khang, van hang
dan chan » dan gian, dan ca, van chat
chan cap » khan cap, than cap, cao cap

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 trinh ((han thang) or (van thang)) nguong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh trinh ((han thang) OR (van thang)) nguong dan chan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - canh trinh ((han thang) or (van thang)) nguong dan chan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - canh trinh ((han thang) or (van thang)) nguong dan chan cap*.