Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dien sach » dien anh
sach nuoc » sach duoc, cac nuoc, bach tuoc
bieu dien » lieu dien, bieu hien, tieu dien
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach

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 y ((nang xa) OR (nang ma)) hoi. bieu dien sach nuoc va hanh di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang ma)) hoi. bieu dien sach nuoc va hanh di ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang ma)) hoi. bieu dien sach nuoc va hanh di ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang ma)) hoi. bieu dien sach nuoc va hanh di ((cua tre) or (cua triet))*.