Perhaps you should try some spelling variations:
doanh cua » doanh luan
vay doanh » van doanh, ly doanh, voi doanh
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cua triet, dua tren
tuc vay » tuc va, tu vay, tuc xay
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
sach ty » sach y, sach tu, sach thu
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach ty)) dang xa hoi. hieu ve cac tuc vay doanh cua ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) dang xa hoi. hieu ve cac tuc vay doanh cua ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) dang xa hoi. hieu ve cac tuc vay doanh cua ((cua tre) or (cuu tre))*".