Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va danh, ban hanh
doi cua » dai cua, hoi cua
ang xa » lang xa, mang xa, dang xay
ve cam » ve cham, ve cac, va cam
di cua » dai cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ang xa hoi. hieu ve cam tuc ((va hanh) OR (va thanh)) ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ang xa hoi. hieu ve cam tuc ((va hanh) OR (va thanh)) ((di cua) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ang xa hoi. hieu ve cam tuc ((va hanh) OR (va thanh)) ((di cua) or (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ang xa hoi. hieu ve cam tuc ((va hanh) OR (va thanh)) ((di cua) or (doi cua)) tre*.