Perhaps you should try some spelling variations:
thang long » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hinh tinh » hinh dinh, hinh kinh, hinh minh
hang nong » han tong
doc hieu » toc thieu, hoc thieu, hoc hien
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
tinh va » tich va, trinh van, trinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hinh tinh va ((hang nong) or (thang long)) tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hinh tinh va ((hang nong) OR (thang long)) tan toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hinh tinh va ((hang nong) or (thang long)) tan toan cao*.