Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
quan trong » gian trong
tieu sach » chieu sach, dien sach, te sach
qua trong » qua trinh, qua song, qua cong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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 tieu sach - nhanh lang ((qua trong) or (quan trong)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - nhanh lang ((qua trong) OR (quan trong)) cong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - nhanh lang ((qua trong) or (quan trong)) cong tap toan cao*.