Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cach thuc » anh thuc, cac thu
thanh vi » hanh vi, thanh va, thanh ve
thuc gia » thuc giai, thue gia, thuc dia
cua tre » cua te, cuu tre, dua tren
va cach » va cac
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
hieu va » lieu va, hieu qua
sach v » sach va, sach y, sach 2

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 v ((nang xa) OR (lang xa)) hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v ((nang xa) OR (lang xa)) hoi. hieu va cach thuc gia thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v ((nang xa) OR (lang xa)) hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: so sach v ((nang xa) OR (lang xa)) hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))*.