Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
van triet » va triet, van thiet, van trieu
nang mai » nang ma, nang tai, lang mai
thuc ban » thuc dan, thu ban, thuc van
thanh va » thanh van, hanh va, thanh ha
vu sach » vu bach, su sach, vu khach
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
va nam » van 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: vu sach y nang mai hoi. hieu ((va nam) or (ha nam)) ((thuc ban) OR (thuoc ban)) thanh va van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang mai hoi. hieu ((va nam) OR (ha nam)) ((thuc ban) OR (thuoc ban)) thanh va van triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang mai hoi. hieu ((va nam) or (ha nam)) ((thuc ban) OR (thuoc ban)) thanh va van triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang mai hoi. hieu ((va nam) or (ha nam)) ((thuc ban) OR (thuoc ban)) thanh va van triet*.