Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
vien nganh » vien thanh
hieu xanh » chieu xanh, hieu manh, hieu nganh
thong cua » thong quan, thong tu, huong cua
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
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 xanh) or (vien nganh)) - thanh thong cua dong cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (vien nganh)) - thanh thong cua dong cong tan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (vien nganh)) - thanh thong cua dong cong tan ((toan tap) or (toan ban))*.