Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cang thang » cong thanh, dang thanh
tieu xanh » tieu danh, chieu xanh, dieu hanh
hang hang » nang hang, hung thang, lang thang
hang nong » thang long, han tong
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((hang hang) OR (cang thang)) ca ((thong cong) OR (hang nong)) tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((hang hang) OR (cang thang)) ca ((thong cong) or (hang nong)) tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hang hang) OR (cang thang)) ca ((thong cong) or (hang nong)) tan toan cao*.