Perhaps you should try some spelling variations:
thuong dong » phuong dong, tuong dong, chuong dong
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh vat » trinh van, trinh luat, sinh vat
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh ve, trinh vi
dong san » cong san, dong bang, dong von
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: ho chieu xanh - hanh ((trinh va) or (trinh vat)) thuong dong san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh va) OR (trinh vat)) thuong dong san than cao*.