Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
lieu tinh » trieu tinh, diep tinh, bien tinh
chua nang » chuc nang, chua xang, kha nang
doanh cao » doanh co, doanh bao, doanh cho
song tap » tong tap, song tam, cuong tap
doan cao » toan cao, doan cap, hoang cao

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 (lieu tinh)) - hanh trinh chua nang song tap ((doan cao) OR (doanh cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (lieu tinh)) - hanh trinh chua nang song tap ((doan cao) OR (doanh cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (lieu tinh)) - hanh trinh chua nang song tap ((doan cao) OR (doanh cao))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (lieu tinh)) - hanh trinh chua nang song tap ((doan cao) OR (doanh cao))*.