Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thu nang » thi nang, thu hang, tho nang
thu bang » thu ban, thu hang, chu bang
dinh vi » dinh ve, dinh viet, dinh tri
dinh di » dinh du, danh di, dinh da
te sach » toc sach
hieu va » lieu va, hieu qua
cam tu » cam thu, nam tu, dam tu
tu van » tu va
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thu bang)) xa hoi. hieu va cam tu van ((dinh di) OR (dinh vi)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu nang) OR (thu bang)) xa hoi. hieu va cam tu van ((dinh di) or (dinh vi)) cau tren~".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) OR (thu bang)) xa hoi. hieu va cam tu van ((dinh di) or (dinh vi)) cau tren*.