Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
minh vua » minh va, linh vua, minh vu
vua cua » vua chua, qua cua, lua cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
cac co » cac cong
cac so » cac bo, cac ho, cac o
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((nang x) or (lang xa)) hoi. hieu ve ((cac so) OR (cac co)) van minh vua cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang x) OR (lang xa)) hoi. hieu ve ((cac so) OR (cac co)) van minh vua cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang x) or (lang xa)) hoi. hieu ve ((cac so) OR (cac co)) van minh vua cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang x) or (lang xa)) hoi. hieu ve ((cac so) OR (cac co)) van minh vua cua te*.