Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham soc » cham soc, tham nuoc, thai son
van hanh » van thanh, ban hanh, van anh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » hieu qua
va hanh » va thanh, va danh, ban hanh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
y van » ly van, ty van, _ van

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 van xay hoi. ((lieu va) or (hieu va)) tham soc ((va hanh) OR (van hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y van xay hoi. ((lieu va) OR (hieu va)) tham soc ((va hanh) OR (van hanh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y van xay hoi. ((lieu va) or (hieu va)) tham soc ((va hanh) OR (van hanh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y van xay hoi. ((lieu va) or (hieu va)) tham soc ((va hanh) OR (van hanh)) vi cuu tre*.