Perhaps you should try some spelling variations:
cong nguong » cong nguon, cong thuong, cong luong
nguong manh » nguong dan, duong manh, luong manh
diep quang » dinh quang
chinh cua » chinh ca, chinh sua, hinh cua
manh toan » thanh toan, anh tuan, tinh toan
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: hoi ((diep quang) or (hieu qua)) - hanh chinh cua cong nguong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((diep quang) OR (hieu qua)) - hanh chinh cua cong nguong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoi ((diep quang) or (hieu qua)) - hanh chinh cua cong nguong manh toan cau*.