Perhaps you should try some spelling variations:
tdanh thang » thanh thang, tranh hang, danh thanh
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
danh thang » danh thanh, dinh thang, nhanh thang
va phuong » va thuong, cac phuong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » 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: theo chieu xanh - ((danh thang) or (tdanh thang)) va phuong cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((danh thang) OR (tdanh thang)) va phuong cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((danh thang) or (tdanh thang)) va phuong cong tap toan cau*.