Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va

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 ((mang xa) or (nang x)) hoi. hieu ve cham duc va danh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((mang xa) OR (nang x)) hoi. hieu ve cham duc va danh va su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((mang xa) or (nang x)) hoi. hieu ve cham duc va danh va su triet*.