Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
doi cua » dai cua, hoi cua, dong cua
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang va
dang ha » dong ha, dung ha, lang ha
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di 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 xa) OR (dang ha)) hoi. hieu va cam xuc va thanh ((vi cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dang xa) OR (dang ha)) hoi. hieu va cam xuc va thanh ((vi cua) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((dang xa) OR (dang ha)) hoi. hieu va cam xuc va thanh ((vi cua) or (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dang xa) OR (dang ha)) hoi. hieu va cam xuc va thanh ((vi cua) or (doi cua)) tre*.