Perhaps you should try some spelling variations:
cua nhung » va nhung
theo toc » ho toc, thac toc, theo bo
toc sach » hoc sach, doc sach, thuoc sach
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo toc sach - anh tang cua nhung ((cong tan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo toc sach - anh tang cua nhung ((cong tan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo toc sach - anh tang cua nhung ((cong tan) OR (cong san)) toan cao*.