Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
khach san » khach hang, thanh san
hoc dieu » hoc thieu, hoc hien
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than tap » toan tap, han tap, phan 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 dieu hanh - ((hanh han) or (khach san)) va thong cong van than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - ((hanh han) OR (khach san)) va thong cong van than tap.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - ((hanh han) or (khach san)) va thong cong van than tap*.