Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thu xang » thu hang, thu bang, thu sang
thu dang » thu hang, thu bang, thu dong
pho cua » cho cua, kho cua, tho cua
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thu xang) or (thu dang)) xa hoi. hieu va cam ((xuc va) OR (tuc va)) thanh pho cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu xang) OR (thu dang)) xa hoi. hieu va cam ((xuc va) OR (tuc va)) thanh pho cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu xang) or (thu dang)) xa hoi. hieu va cam ((xuc va) OR (tuc va)) thanh pho cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu xang) or (thu dang)) xa hoi. hieu va cam ((xuc va) OR (tuc va)) thanh pho cua viet*.