Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (co sach)) ky nang x hoi. hieu ve ((cham soc) or (nham thuc)) va thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (co sach)) ky nang x hoi. hieu ve ((cham soc) OR (nham thuc)) va thanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (co sach)) ky nang x hoi. hieu ve ((cham soc) or (nham thuc)) va thanh vai cua viet*.