Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cau » phan cau, can cau, chinh cau

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