Perhaps you should try some spelling variations:
hieu voi » hieu moi, lieu voi, hieu loi
te sach » toc sach
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
hieu vi » hieu va, hieu ve, hien vi
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
bo sach » co sach, hoc sach
di cua » dai cua, doi cua, de cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (bo sach)) ky dang xa hoi. ((hieu vi) OR (hieu voi)) pham duc va danh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (bo sach)) ky dang xa hoi. ((hieu vi) OR (hieu voi)) pham duc va danh di cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (bo sach)) ky dang xa hoi. ((hieu vi) OR (hieu voi)) pham duc va danh di cua su".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (bo sach)) ky dang xa hoi. ((hieu vi) OR (hieu voi)) pham duc va danh di cua su*.