Perhaps you should try some spelling variations:
thien van » thi van
phan duc » phan tu, phan dau, tran duc
ban hanh » ban hang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky lang xa hoi. thien van ((phan duc) or (pham duc)) ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky lang xa hoi. thien van ((phan duc) OR (pham duc)) ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky lang xa hoi. thien van ((phan duc) or (pham duc)) ban hanh vi cua tre*.