Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
chuan nang » chua nang, chuan trang, chuc nang
song tap » tong tap, song tam, cuong tap
tap doan » tap quan
doan cao » doanh cao, toan cao, doan cap

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) or (diep tinh)) - canh trinh chuan nang song tap doan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (diep tinh)) - canh trinh chuan nang song tap doan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (diep tinh)) - canh trinh chuan nang song tap doan cao*.