Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tran tuan » tran xuan, tran thanh, tranh luan
doc hieu » toc thieu, hoc thieu, hoc hien
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van 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 - hanh ((tran tuan) OR (tran quang)) thong cong van toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((tran tuan) OR (tran quang)) thong cong van toan ban*".