Perhaps you should try some spelling variations:
tinh voi » trinh voi, tinh doi, binh voi
chu may » chua may, cau may, cho may
sach ty » sach y, sach tu, sach thu
tinh vi » trinh vi, tinh va, dinh vi
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach hay
cac chu » cac thu, cac che, cac khu
ve cac » va cac, vien cac
van xa » van xay, van ha, dan xa
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: su ((sach ly) or (sach ty)) van xa hoi. hieu ve cac chu may ((tinh vi) OR (tinh voi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach ty)) van xa hoi. hieu ve cac chu may ((tinh vi) OR (tinh voi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) or (sach ty)) van xa hoi. hieu ve cac chu may ((tinh vi) OR (tinh voi)) cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach ty)) van xa hoi. hieu ve cac chu may ((tinh vi) OR (tinh voi)) cua te*.