Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
tieu tinh » trieu tinh, tieu trinh, lieu tinh
dung cong » dung trong
tong cong » trong cong, cong cong, dang cong
dan toan » van toan, dan than, manh 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 tieu tinh - hanh trinh quan ((dung cong) or (tong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh trinh quan ((dung cong) OR (tong cong)) dan toan cau*.