Perhaps you should try some spelling variations:
nang duong » nang luong, nang dong, tang duong
hoc thieu » toc thieu, hoc hien
qua trong » quan trong, qua trinh, qua song
ho chieu » theo chieu, doi chieu, mot chieu
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) sang - nang duong qua trong cong san ((toan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sang - nang duong qua trong cong san ((toan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sang - nang duong qua trong cong san ((toan cau) or (phan dau))*.