Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
de cua » te cua, dieu cua
le cua » ly cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x ho. hieu va cac xuc va thanh ((de cua) OR (le cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang x ho. hieu va cac xuc va thanh ((de cua) OR (le cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x ho. hieu va cac xuc va thanh ((de cua) OR (le cua)) triet*.