Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
chieu xanh » chieu sach, chieu sang, chieu tinh
phong cong » phong chong, thong cong, chong cong
thien anh » thien danh, tien anh, thien thanh
tranh van » tran van, trinh van, thanh van
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien anh)) - canh tranh van ((phuong cong) OR (phong cong)) dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - canh tranh van ((phuong cong) OR (phong cong)) dan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (thien anh)) - canh tranh van ((phuong cong) OR (phong cong)) dan khan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - canh tranh van ((phuong cong) OR (phong cong)) dan khan cap*.