Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
su sach » so sach, vu sach
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
loc va » luc va
di cua » dai cua, doi cua, de cua
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 ky lang xa hoi. ((hieu van) OR (thien van)) lam ((loc va) or (hoc va)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. ((hieu van) OR (thien van)) lam ((loc va) OR (hoc va)) hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. ((hieu van) OR (thien van)) lam ((loc va) or (hoc va)) hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. ((hieu van) OR (thien van)) lam ((loc va) or (hoc va)) hanh di cua te*.