Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
van cham » van chat, van tham, va cham
lang xa » lang ha, lang van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y ((lang xa) OR (dang xay)) hoi. thien van cham soc ((va hanh) or (va danh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((lang xa) OR (dang xay)) hoi. thien van cham soc ((va hanh) OR (va danh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((lang xa) OR (dang xay)) hoi. thien van cham soc ((va hanh) or (va danh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((lang xa) OR (dang xay)) hoi. thien van cham soc ((va hanh) or (va danh)) vi cuu tre*.