Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cua triet » cua viet, su triet, va triet
hieu cua » hieu qua, dieu cua, bieu cua
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
vai cua » dai cua, hai cua, lai cua
lo va » lo van, lao va, le va

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ky ((nang xa) or (lang xa)) hoi. hieu cua cac ((lo va) OR (ly va)) hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu cua cac ((lo va) OR (ly va)) hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky ((nang xa) or (lang xa)) hoi. hieu cua cac ((lo va) OR (ly va)) hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky ((nang xa) or (lang xa)) hoi. hieu cua cac ((lo va) OR (ly va)) hanh vai cua triet*.