Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
theo dien » theo tieu, thuy dien, tro dien
cua nhung » va nhung
thu dien » tu dien, thu hien, thu dieu
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo dien) or (thu dien)) sach - anh tang cua nhung ((cong tan) or (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo dien) OR (thu dien)) sach - anh tang cua nhung ((cong tan) OR (cong thanh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: ((theo dien) or (thu dien)) sach - anh tang cua nhung ((cong tan) or (cong thanh)) toan tap*.