Perhaps you should try some spelling variations:
nang quan » ban quan, nang suat
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
chi tinh » chai tinh, chi minh, chi binh
anh nang » ganh nang, anh bang, anh dang
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tinh - anh nang quan dung cong san ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi tinh - anh nang quan dung cong san ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi chi tinh - anh nang quan dung cong san ((toan cau) OR (toan ban))*.