Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hua khong » hoa khong, hoac khong, phuc khong
cua khong » cua phuong, cua thuong, cua cong
vien anh » vien canh, dien anh, tien anh
cang tan » cong tan, cung tan, tang tan
tan toan » tan tran, tap toan, van toan
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: hoc ((vien anh) OR (viet anh)) - hanh trinh ((hua khong) or (cua khong)) cang tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((vien anh) OR (viet anh)) - hanh trinh ((hua khong) OR (cua khong)) cang tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((vien anh) OR (viet anh)) - hanh trinh ((hua khong) or (cua khong)) cang tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((vien anh) OR (viet anh)) - hanh trinh ((hua khong) or (cua khong)) cang tan toan cao*.