Perhaps you should try some spelling variations:
toan thanh » tran thanh, hoan thanh, toan thang
duc toan » duc tan, duc ton, duc hoan
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
co duc » co duoc, cao duc, do duc
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho
va co » vo co

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 (thu hoach)) ky nang x hoi. lieu va co duc toan thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang x hoi. lieu va co duc toan thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang x hoi. lieu va co duc toan thanh vi cua tre*.