Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
anh thang » danh thang, manh thang, anh thong
thong san » thong sang, trong san, thong van
doc hieu » toc thieu, hoc thieu, hoc hien
thang va » hang va, trang va, thong va
va thong » va thuong, va phuong, he thong
toan ban » van ban

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 manh - anh thang va thong thong san ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - anh thang va thong thong san ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - anh thang va thong thong san ((toan tap) or (toan ban))*.