Perhaps you should try some spelling variations:
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
danh vi » hanh vi, dinh vi, danh di
y lang » o lang, _ lang, tay lang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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 lang xa hoi. hieu qua cac ((xuc va) OR (tuc va)) danh vi ((cua te) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. hieu qua cac ((xuc va) OR (tuc va)) danh vi ((cua te) OR (cua cu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y lang xa hoi. hieu qua cac ((xuc va) OR (tuc va)) danh vi ((cua te) or (cua cu))*".