Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
hanh via » hanh vi, hanh va, anh va
su sach » so sach, vu sach
xang xa » lang xa, mang xa, ang xa
thi van » thi lan, thi hanh, thi nang
via cua » gia cua, gian cua, giau cua
cua tre » cua te, cuu tre, cua triet
y xang » ty xang
xuc va » duc va, tuc va, luc va

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 y xang xa hoi. ((thien van) OR (thi van)) cam ((xuc va) or (thuc day)) hanh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y xang xa hoi. ((thien van) OR (thi van)) cam ((xuc va) OR (thuc day)) hanh via cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y xang xa hoi. ((thien van) OR (thi van)) cam ((xuc va) or (thuc day)) hanh via cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y xang xa hoi. ((thien van) OR (thi van)) cam ((xuc va) or (thuc day)) hanh via cua tre*.