Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
tinh vai » tinh va, tinh hai, tinh bai
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cac bao » cach bao, cac bai, cac ban
va tinh » may tinh
vai cua » dai cua, hai cua, lai cua
bao va » bao ve, tao va, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y ((nang xa) or (nang x)) hoi. hieu va cac bao va tinh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y ((nang xa) OR (nang x)) hoi. hieu va cac bao va tinh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y ((nang xa) or (nang x)) hoi. hieu va cac bao va tinh vai cua triet*.