Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cac thuc » cach thuc, cac thu, can thuc
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ((ma hoi) or (mai hoi)). ((hieu va) OR (hieu qua)) cac thuc vat thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ((ma hoi) OR (mai hoi)). ((hieu va) OR (hieu qua)) cac thuc vat thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ((ma hoi) or (mai hoi)). ((hieu va) OR (hieu qua)) cac thuc vat thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((ma hoi) or (mai hoi)). ((hieu va) OR (hieu qua)) cac thuc vat thanh dai cua triet*.