Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
manh hai » lanh hai, minh hai, thanh hai
xay manh » day manh, van manh, ha manh
lang van » dang van, tang van, hoang van
thuc xay » thuc day, tuc xay, thuat xay
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((dang xa) or (lang van)) hoi. hieu ve nam thuc xay manh hai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dang xa) OR (lang van)) hoi. hieu ve nam thuc xay manh hai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dang xa) or (lang van)) hoi. hieu ve nam thuc xay manh hai ((cua tre) or (cuu tre))*.