Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu sach » chieu sach, dien sach, te sach
nhanh bac » nhanh ha, nhanh va
cong tap » cuong tap, cong tac, cong tan
toan cau » toan cao, toan tai
toan ban » van ban
bac va » ban va, bac ha, bao va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - nhanh bac va nhung cong tap ((toan cau) or (((toan tap) or (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - nhanh bac va nhung cong tap ((toan cau) OR (((toan tap) OR (toan ban)))).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - nhanh bac va nhung cong tap ((toan cau) or (((toan tap) or (toan ban))))*.