Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue xang » thu hang, chua xang, thu bang
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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 thue xang xa hoi. ((hieu ve) OR (hieu van)) cac ((xuc va) or (tuc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thue xang xa hoi. ((hieu ve) OR (hieu van)) cac ((xuc va) OR (tuc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thue xang xa hoi. ((hieu ve) OR (hieu van)) cac ((xuc va) or (tuc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach thue xang xa hoi. ((hieu ve) OR (hieu van)) cac ((xuc va) or (tuc va)) hanh vai cua te*.