Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, nhung don
hien xanh » hien hanh, chieu xanh, hien khanh
hanh hang » thanh hang, hang hang, hanh han
hang cong » dang cong, hang nong, bang cong
hang cua » mang cua, hang ca, huong cua
tap quan » tac quan, hai quan
quan cao » quang cao, quan cau, quan ao

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) or (hien nhanh)) - hanh hang cua ((nhung cong) OR (hang cong)) tap quan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh hang cua ((nhung cong) OR (hang cong)) tap quan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - hanh hang cua ((nhung cong) OR (hang cong)) tap quan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - hanh hang cua ((nhung cong) OR (hang cong)) tap quan cao*.