Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
ban benh » san benh, ba benh, ban banh
van chat » cao chat
xay hoi » xa hoi, tay hoi, cay phoi
chat do » chat deo, chat doc, chat co
benh vi » benh va, benh ve, benh li
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
2 dang » 2 danh, _ dang, b dang
y dang » ky dang, _ dang, b dang
do ban » doi ban, co ban, do ben

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y dang) OR (2 dang)) xay hoi. thien van chat do ban benh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y dang) OR (2 dang)) xay hoi. thien van chat do ban benh vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y dang) OR (2 dang)) xay hoi. thien van chat do ban benh vi ((cua tre) or (cuu tre))*".