Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
thanh vu » thanh va, thanh ve, thanh tu
tang tao » sang tao, tang tai, nang tao
hieu van » hieu va, thien van, lieu va
soc ban » hoc ban, coc ban, so ban
tu cach » tu cac
tao hoi » tao khoi, tao boi, tay hoi
ky tang » ky nang, ky dang, kho tang
bo sach » co sach, hoc sach
hieu ve » hieu va
vu va » vu van, tu va, su 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 cach) or (bo sach)) ky tang tao hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (bo sach)) ky tang tao hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh vu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (bo sach)) ky tang tao hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh vu va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (bo sach)) ky tang tao hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh vu va triet*.