Perhaps you should try some spelling variations:
khach san » khach hang, thanh san
trong van » trong cac
chu tich » chu thich, thu tich, cuu tinh
hanh han » hanh nhan, hanh phan, hanh san
qua dung » quang dung, su dung, qua song
van toan » van tuan, van tan, van thanh
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 ((chu tich) or (co tich)) - ((hanh han) or (khach san)) qua dung trong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu tich) OR (co tich)) - ((hanh han) OR (khach san)) qua dung trong van toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu tich) or (co tich)) - ((hanh han) or (khach san)) qua dung trong van toan cau*.