Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu xanh » chieu xanh, hieu manh, thien anh
hanh sinh » hanh dinh, hinh sinh, hanh chinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dang cong » dung cong
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - ((hanh sinh) OR (hanh tinh)) vat ((nhung cong) or (dang cong)) ban thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((hanh sinh) OR (hanh tinh)) vat ((nhung cong) OR (dang cong)) ban thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - ((hanh sinh) OR (hanh tinh)) vat ((nhung cong) or (dang cong)) ban thanh tap".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - ((hanh sinh) OR (hanh tinh)) vat ((nhung cong) or (dang cong)) ban thanh tap*.