Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
xang xa » lang xa, mang xa, ang xa
su tien » su kien, su hien, tu tieng
ve cac » va cac, vien cac
vi su » va su, ve su, ki 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 ty xang xa hoi. hieu ((ve cac) or (va cham)) luc ((va thanh) OR (gia thanh)) vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu ((ve cac) OR (va cham)) luc ((va thanh) OR (gia thanh)) vi su tien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. hieu ((ve cac) or (va cham)) luc ((va thanh) OR (gia thanh)) vi su tien*".