Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hanh phan » thanh phan, anh phan, hanh han
tong cong » trong cong, cong cong, dung cong
vang than » sang than, van than, dang thanh
hoc dieu » hoc thieu, hoc hien
hanh san » thanh san, khach san, thanh son
va tong » va thong, va tuong, va trong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - ((hanh phan) OR (hanh san)) va tong cong ((vang than) OR (cang thang)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - ((hanh phan) or (hanh san)) va tong cong ((vang than) OR (cang thang)) tap~".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - ((hanh phan) or (hanh san)) va tong cong ((vang than) OR (cang thang)) tap*.