Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
xay hoi » tay hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 dang ((xay hoi) OR (xa hoi)). hieu va cam xuc va thanh ((vai cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang ((xay hoi) OR (xa hoi)). hieu va cam xuc va thanh ((vai cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang ((xay hoi) OR (xa hoi)). hieu va cam xuc va thanh ((vai cua) or (di cua)) tre*".