Perhaps you should try some spelling variations:
thien van » thi van
van phan » van phong, van thanh, luan phan
hanh vai » hanh vi, hanh tai, hanh van
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
san ky » sang ky, van ky, dan ky
tu ban » thu ban, te ban
tu san » thu san, tu can, vu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang xa) or (nang ma)) hoi. thien van phan tu ban ((hanh vai) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (nang ma)) hoi. thien van phan tu ban ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang xa) or (nang ma)) hoi. thien van phan tu ban ((hanh vai) OR (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) or (nang ma)) hoi. thien van phan tu ban ((hanh vai) OR (hanh va)) cua tre*.