Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thuc dao » thuc dan, thuc day, chuc dao
cau tren » cu tren, dau tren, ca tren
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
dao dan » dao van, cao dang, dao dong
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
sai ky » sac ky
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sai ky) or (sach y)) lang xa hoi. hieu va nam thuc dao dan vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sai ky) OR (sach y)) lang xa hoi. hieu va nam thuc dao dan vai cau tren.
• Adding a wildcard symbol may retrieve word variants: toc ((sai ky) or (sach y)) lang xa hoi. hieu va nam thuc dao dan vai cau tren*.