Perhaps you should try some spelling variations:
khong tang » khong cang, khong thanh, khong trong
hanh trinh » canh tranh
hua khong » hoa khong, cua khong, hoac khong
chi hanh » chi nhanh, chi thanh, thi hanh
tang tan » tang van, tang tai, tang dan
tan toan » tan tran, tap toan, van toan
toan ban » van ban
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 hanh - ((hanh trinh) or (hanh chinh)) hua khong tang tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi hanh - ((hanh trinh) OR (hanh chinh)) hua khong tang tan toan ban*.