Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
dang xay » dang van, van xay
cong tan » cong tac, cong san, cong thanh
tan quan » tang quan, toan quan, van quan
quan cap » quan cau, quan lap, quang cao
lang xa » lang ha, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - nhanh ((lang xa) OR (dang xay)) thuong cong tan quan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - nhanh ((lang xa) OR (dang xay)) thuong cong tan quan cap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh ((lang xa) OR (dang xay)) thuong cong tan quan cap*.