Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh quan » tinh quang, trinh luat, trinh han
trinh van » trinh han, trinh toan, dinh van
tuong dan » huong dan, xuong dan, truong dai
ho chieu » theo chieu, hoc thieu, doi chieu
tung dan » dung dan, huong dan, trung dai
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - hanh ((trinh van) or (trinh quan)) nhung ((tuong dan) OR (tung dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh van) OR (trinh quan)) nhung ((tuong dan) OR (tung dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh van) or (trinh quan)) nhung ((tuong dan) OR (tung dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh van) or (trinh quan)) nhung ((tuong dan) OR (tung dan)) toan cau*.