Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, doi chieu, mot chieu
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - hanh hang va ((nhung cong) or (dung cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh hang va ((nhung cong) OR (dung cong)) manh toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - hanh hang va ((nhung cong) or (dung cong)) manh toan cau*.