Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
va thong » va phuong, he thong, va cong
toan cao » toan ban, toan tap
cua chu » sua chua
chu van » cuu van, chu han

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

• Performing a fuzzy search may retrieve terms with similar spellings: cua chu van - hanh trinh ((va thong) or (va thuong)) cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cua chu van - hanh trinh ((va thong) OR (va thuong)) cong vang toan cao.
• Adding a wildcard symbol may retrieve word variants: cua chu van - hanh trinh ((va thong) or (va thuong)) cong vang toan cao*.