Perhaps you should try some spelling variations:
nhan khong » nhan thong, nhanh chong, nganh khong
hieu lang » chieu sang, hieu quang, nhieu tang
khong dan » khong day, thong dan, khong dam
anh hung » anh huong, manh hung, anh dung
hung cua » huong cua, chung cua, khung cua
cua nhan » ca nhan, cua ngan, cua nha
dan toan » van toan, dan than, manh 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: theo ((dieu hanh) or (hieu lang)) - anh hung cua nhan khong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (hieu lang)) - anh hung cua nhan khong dan toan cau*.