Perhaps you should try some spelling variations:
thien van » thi van
sanh thu » sach thu, san thu, doanh thu
so sanh » do sanh
xang xa » mang xa, ang xa, dang xay
lang xa » lang ha, dang xay, lang van
van bac » van ban, van bao, van hac
cua tre » cua te, cuu tre, cua triet
xac va » tac va, ac va, bac va
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: so sanh thu ((xang xa) OR (lang xa)) hoi. thien van bac ((xac va) or (duc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thu ((xang xa) OR (lang xa)) hoi. thien van bac ((xac va) OR (duc va)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh thu ((xang xa) OR (lang xa)) hoi. thien van bac ((xac va) or (duc va)) hanh vi cua tre*".