Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
vai cac » va cac, voi cac, vay cac
tai cac » tai cuc
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu va nam thuc va dao ((vai cac) OR (tai cac)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu va nam thuc va dao ((vai cac) OR (tai cac)) treo".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu va nam thuc va dao ((vai cac) OR (tai cac)) treo*.