Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
qua cai » qua hai, qua cac, qua ca
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cai xuc » cam xuc, chat xuc
xuc va » duc va, tuc va, luc va
di su » doi su, da su, de su
ki su » ky 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 ((nang ma) or (hang va)) hoi. hieu qua cai xuc va thanh ((di su) or (ki su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang ma) OR (hang va)) hoi. hieu qua cai xuc va thanh ((di su) OR (ki su)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang ma) or (hang va)) hoi. hieu qua cai xuc va thanh ((di su) or (ki su)) triet*.