Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
thanh ve » hanh ve, thanh va, thanh vien
hieu va » hieu qua
thu vat » thuc vat, thu va, thuat vat
y nang » ky nang, ly nang, v nang
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((x hoi) or (x ho)). ((lieu va) or (hieu va)) nam thu vat thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((x hoi) OR (x ho)). ((lieu va) OR (hieu va)) nam thu vat thanh ve cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((x hoi) or (x ho)). ((lieu va) or (hieu va)) nam thu vat thanh ve cua triet*.