Perhaps you should try some spelling variations:
hanh mang » nhanh mang, hanh trang, nhanh lang
mang suat » nang suat, cong suat, mang cua
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » hoc thieu, hoc hien
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) or (toc thieu)) manh - hanh mang suat ((tong cong) OR (cong cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) manh - hanh mang suat ((tong cong) OR (cong cong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) manh - hanh mang suat ((tong cong) OR (cong cong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) manh - hanh mang suat ((tong cong) OR (cong cong)) manh toan ban*.