Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh qua » trinh quan, trinh cua, trinh luat
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
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: hoc hien xanh - canh ((trinh qua) or (trinh quang)) dung cong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((trinh qua) OR (trinh quang)) dung cong danh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((trinh qua) or (trinh quang)) dung cong danh toan cau*.