Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh dinh » thanh dinh, hinh dinh, hanh tinh
thong van » trong van, thong va, thong quan
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va thuong, va phuong, va cong

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 dinh ((va thong) or (he thong)) thong van thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh dinh ((va thong) OR (he thong)) thong van thanh tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh dinh ((va thong) or (he thong)) thong van thanh tap*.