Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
cuc ban » cua ban, cuu ban, duc ban
cac ban » cac dan, cac van, can ban
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
hai va » hai van, thai va, hoi va

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) or (sac ky)) nang xa hoi. hieu va cam ((cuc ban) OR (cac ban)) thanh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) nang xa hoi. hieu va cam ((cuc ban) OR (cac ban)) thanh hai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sac ky)) nang xa hoi. hieu va cam ((cuc ban) OR (cac ban)) thanh hai va triet*".