Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan lap
hang dau » hang va
hang tai » hang va, dung tai

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 tranh cua dung cong dan ((phan cac) or (((hang dau) OR (hang tai))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh tranh cua dung cong dan ((phan cac) OR (((hang dau) OR (hang tai)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh tranh cua dung cong dan ((phan cac) or (((hang dau) OR (hang tai))))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tranh cua dung cong dan ((phan cac) or (((hang dau) OR (hang tai))))*.