Perhaps you should try some spelling variations:
cham loc » cham soc, chon loc, cham o
ve cham » va cham, ve chat, vu cham
hai cua » thai cua, dai cua, hoi cua
va dauh » va danh, va doanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ky danh » ky anh, ky dang
cua tre » cua te, cuu tre, cua triet
y danh » ly danh, 1 danh, 2 danh
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y danh) OR (ky danh)) xa hoi. hieu ve cham loc ((va dauh) or (va dau)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y danh) OR (ky danh)) xa hoi. hieu ve cham loc ((va dauh) OR (va dau)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y danh) OR (ky danh)) xa hoi. hieu ve cham loc ((va dauh) or (va dau)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y danh) OR (ky danh)) xa hoi. hieu ve cham loc ((va dauh) or (va dau)) hai cua tre*.