Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
canh hang » tranh hang, cang thang, danh thang
cong cong » cong dong, trong cong, dung cong
thanh pha » thanh phan, thanh pham, thanh pho
pha cau » phan cau, phap cau, pha cac
ung » cung
dung » dcung

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