Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
vang tuan » van tuan, quang tuan, hoang tuan
vong tuan » vuong tuan, cong tuan, hoang tuan
cua dung » cua dang, cua dong, qua dung

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 sach - ((nhanh chong) or (nhanh quang)) cua dung cong ((vang tuan) OR (vong tuan)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((nhanh chong) OR (nhanh quang)) cua dung cong ((vang tuan) OR (vong tuan)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((nhanh chong) or (nhanh quang)) cua dung cong ((vang tuan) OR (vong tuan)) tu".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((nhanh chong) or (nhanh quang)) cua dung cong ((vang tuan) OR (vong tuan)) tu*.