Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
doanh van » doan van, doanh va, doanh ban
xa doanh » va doanh, hoa doanh, van doanh
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang xa) or (lang xa)) hoi. hieu va cham thuc xa doanh van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va cham thuc xa doanh van ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (lang xa)) hoi. hieu va cham thuc xa doanh van ((cua tre) OR (cuu tre))*".