Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
phuong hanh » phuong thanh, phuong anh, phuong danh
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
toan ban » van ban
toan cao » toan tap
bang va » ban va, trang va, dang van

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 - hanh ((bang va) or (hang va)) dung phuong hanh ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh ((bang va) OR (hang va)) dung phuong hanh ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh ((bang va) or (hang va)) dung phuong hanh ((toan ban) or (toan cao))*.