Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
cua triet » cua viet, su triet, va triet
nang ban » hang ban, nang quan, nang sang
nang cap » nang cao, nang cham, nang phap
than cua » nhan cua, thai cua, ban cua
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cao luc » bao luc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va

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 ky ((nang ban) or (nang cap)) hoi. hieu va cao luc va hanh than cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang ban) OR (nang cap)) hoi. hieu va cao luc va hanh than cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang ban) or (nang cap)) hoi. hieu va cao luc va hanh than cua triet*.