Perhaps you should try some spelling variations:
cay phoi » cap phoi, tay hoi, cay cho
te sach » toc sach
ve cuoc » va cuoc, ve duoc, ve nuoc
xay hoi » xa hoi, tay hoi, gay thoi
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
sach ty » sach y, sach tu, sach thu
thue va » thuc va, thuyet va, thuc vat
ve suc » va suc, ve su
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty xang ((xay hoi) OR (cay phoi)). hieu ((ve suc) or (ve cuoc)) thue va tinh ve cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ((xay hoi) OR (cay phoi)). hieu ((ve suc) OR (ve cuoc)) thue va tinh ve cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang ((xay hoi) OR (cay phoi)). hieu ((ve suc) or (ve cuoc)) thue va tinh ve cua vat".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ((xay hoi) OR (cay phoi)). hieu ((ve suc) or (ve cuoc)) thue va tinh ve cua vat*.