Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
quoc bao » quoc oai, hoc bao, quoc va
dang mau » dong mau, dang van, dang su
phan cuu » phan cau, phan huu, phan cung
cuu tre » cua tre, cau tren, cau treo
ky dang » ky nang, ky danh
mau hoi » cau hoi, mai hoi, mau ho
hieu va » lieu va
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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 sac ky dang mau hoi. ((hieu va) OR (hieu qua)) cam ((duc tan) OR (quoc bao)) thanh phan cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang mau hoi. ((hieu va) OR (hieu qua)) cam ((duc tan) or (quoc bao)) thanh phan cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang mau hoi. ((hieu va) OR (hieu qua)) cam ((duc tan) or (quoc bao)) thanh phan cuu tre*.