Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, lang van
tinh va » tich va, trinh van, trinh vat
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
va cua » va chua, via cua, ca cua
ve coc » ve cuoc, ve cac, ve co
tuc va » truc va, tuc xa, duc va
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) OR (dang xay)) hoi. hieu ve coc ((tuc va) or (thuc va)) tinh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (dang xay)) hoi. hieu ve coc ((tuc va) OR (thuc va)) tinh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) OR (dang xay)) hoi. hieu ve coc ((tuc va) or (thuc va)) tinh va cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) OR (dang xay)) hoi. hieu ve coc ((tuc va) or (thuc va)) tinh va cua te*.