Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hinh sinh » tinh sinh, hinh dinh, hinh kinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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 - ((hinh sinh) or (hanh tinh)) cua dung cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hinh sinh) OR (hanh tinh)) cua dung cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hinh sinh) or (hanh tinh)) cua dung cong san ((toan cao) or (toan ban))*.