Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
tranh tuan » tran tuan, tranh luan, thanh tuan
dung huong » dung thuong, dung phuong, dong huong
tuan dung » tuan duong, tran dung, tan dung
manh toan » thanh toan, anh tuan

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 tinh) or (chieu sang)) - canh tranh tuan dung huong ((manh toan) OR (tinh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chieu sang)) - canh tranh tuan dung huong ((manh toan) OR (tinh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (chieu sang)) - canh tranh tuan dung huong ((manh toan) OR (tinh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chieu sang)) - canh tranh tuan dung huong ((manh toan) OR (tinh toan)) ban*.