Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
quang cua » quan cua, quang tuan, quang huy
hang cong » dang cong, hang nong, bang cong
chan tu » phan tu, han tu, chon tu
con tu » mon tu

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