Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
luong tai » dung tai, luong va
anh dung » anh dong, sach dung, ung dung
tai toan » bai toan, tap toan, tai tuan
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 chieu sang - ((anh dung) or (anh huong)) va nhung luong tai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - ((anh dung) OR (anh huong)) va nhung luong tai toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - ((anh dung) or (anh huong)) va nhung luong tai toan cao*.