Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh qua » trinh quan, trinh cua, trinh quang
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
qua dung » quang dung, su dung, qua song
tan toan » tap toan, van toan, dan toan
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - hanh trinh qua dung cong ((tan toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh trinh qua dung cong ((tan toan) OR (tan tran)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh trinh qua dung cong ((tan toan) or (tan tran)) cau*.