Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
phat duc » pham duc, phan duoc, pham duy
phan duc » pham duc, phan tu, phan dau
van chua » va chua, van chia, van chu
chua tre » chua tri, cua tre, chua trieu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
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: su sach ky nang x hoi. thien van ((phat duc) or (phan duc)) ban thanh van chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. thien van ((phat duc) OR (phan duc)) ban thanh van chua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. thien van ((phat duc) or (phan duc)) ban thanh van chua tre*.