Perhaps you should try some spelling variations:
thanh nam » hanh nam, thanh tam, thanh pham
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
he triet » ve triet, chet triet, hieu triet
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang x » nang x
ve nam » va nam, le nam, te nam
he nam » ha nam, nghe nam
nam he » nam ha, nam hien, nam nghe
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty xang x hoi. hieu ((ve nam) OR (he nam)) thuc day thanh nam he triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty xang x hoi. hieu ((ve nam) OR (he nam)) thuc day thanh nam he triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty xang x hoi. hieu ((ve nam) OR (he nam)) thuc day thanh nam he triet*.