Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
nang can » nang cao, nang ban, nang cai
nang cap » nang cao, nang cham, nang phap
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
than va » thanh va, nhan va, toan va
va cam » va cham, va cac, va cao

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