Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va
cua tre » cua te, cuu tre, dua tren

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: su sach ky dang xa hoi. ((hieu va) OR (hieu qua)) cham duc va thanh va ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. ((hieu va) or (hieu qua)) cham duc va thanh va ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. ((hieu va) or (hieu qua)) cham duc va thanh va ((cua tre) OR (cua triet))*.