Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
truong va » truong dai, truong cao, truong dao
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » trang va, trung ha, trung tam
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 - thanh ((trung va) OR (truong va)) thong cong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh ((trung va) OR (truong va)) thong cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh ((trung va) OR (truong va)) thong cong tac toan ban*.