Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
gia doanh » gia thanh, gia dinh, giai doan
sach ly » sach y, sach lo, sach hay
tai cua » thai cua, tai cuc, tri cua
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
vang xa » lang xa, mang xa, ang xa
sach ty » sach y, sach tu, sach thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ly) or (sach ty)) vang xa hoi. hieu ve ((cam duc) OR (cao duc)) gia doanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach ty)) vang xa hoi. hieu ve ((cam duc) OR (cao duc)) gia doanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) or (sach ty)) vang xa hoi. hieu ve ((cam duc) OR (cao duc)) gia doanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) or (sach ty)) vang xa hoi. hieu ve ((cam duc) OR (cao duc)) gia doanh tai cua triet*.