Perhaps you should try some spelling variations:
dung luong » dung thuong, dung phuong, dung truong
chinh luat » chinh luan, hinh luat, trinh luat
doi chieu » doi chi, ho chieu, mot chieu
luat dung » suat dung, luat chung, luat quang
manh toan » thanh toan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doc hieu)) tinh - hanh chinh luat dung luong ((manh toan) OR (anh tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) tinh - hanh chinh luat dung luong ((manh toan) OR (anh tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doc hieu)) tinh - hanh chinh luat dung luong ((manh toan) OR (anh tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) tinh - hanh chinh luat dung luong ((manh toan) OR (anh tuan)) cao*.