Perhaps you should try some spelling variations:
tinh vai » tinh va, tinh hai, tinh bai
sach ly » sach lo, sach ty, sach hay
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cac khu » cac thu, cac khoi, cac kieu
khu may » chu may, chua may, phuc may
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 y)) van xay hoi. hieu ve cac khu may tinh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach y)) van xay hoi. hieu ve cac khu may tinh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) OR (sach y)) van xay hoi. hieu ve cac khu may tinh vai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) OR (sach y)) van xay hoi. hieu ve cac khu may tinh vai ((cua te) or (cua tu))*.