Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh chua » trinh cua, trinh chu, tinh chua
doi chieu » doc hieu, doi chi, ho chieu
dang cong » dung cong
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh ((trinh chua) OR (trinh chuan)) dang cong san than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh ((trinh chua) OR (trinh chuan)) dang cong san than cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trinh chua) OR (trinh chuan)) dang cong san than cao*.