Perhaps you should try some spelling variations:
trinh quang » tinh quang, tranh quang, trinh dung
trinh quan » tinh quang, trinh luat, trinh han
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh ((trinh quang) OR (trinh quan)) dung cong tan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh ((trinh quang) OR (trinh quan)) dung cong tan ((toan cau) OR (toan tap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((trinh quang) OR (trinh quan)) dung cong tan ((toan cau) or (toan tap))*".