Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
nhanh ban » nhanh bac, nhanh ba, thanh ban
cong dang » cong dong, cong dan, cong dung
dang toan » dang tran, dan toan, dung toan
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
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 - nhanh ban ((cua dung) OR (cua dang)) cong dang toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - nhanh ban ((cua dung) OR (cua dang)) cong dang toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - nhanh ban ((cua dung) OR (cua dang)) cong dang toan cao*.