Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (hoc thieu)) xanh - hanh tang va ((nhung cong) OR (thong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc thieu)) xanh - hanh tang va ((nhung cong) OR (thong cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (hoc thieu)) xanh - hanh tang va ((nhung cong) OR (thong cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc thieu)) xanh - hanh tang va ((nhung cong) OR (thong cong)) dan toan cao*.