Perhaps you should try some spelling variations:
thien van » thi van
dang xay » dang van, van xay
ban benh » san benh, ba benh, ban banh
benh lai » benh dai, benh tai, benh lao
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, lang van
thu ban » thu hang
lai cau » lai chau, lai cam, loi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang xa) or (((lang xa) OR (dang xay)))) hoi. thien van nam thu ban benh lai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (((lang xa) OR (dang xay)))) hoi. thien van nam thu ban benh lai cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (((lang xa) OR (dang xay)))) hoi. thien van nam thu ban benh lai cau tren*".