Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh han
nhung cong » dung cong, thong cong, hang cong
doc hieu » toc thieu, hoc thieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
luat » luan, xuat

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) OR (hoc hien)) xanh - hanh ((trinh luat) or (trinh quan)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - hanh ((trinh luat) OR (trinh quan)) nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc hien)) xanh - hanh ((trinh luat) or (trinh quan)) nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc hien)) xanh - hanh ((trinh luat) or (trinh quan)) nhung cong dan toan cau*.