Perhaps you should try some spelling variations:
nang cai » nang cao, nang tai, nang can
nhan cua » nhat cua, nhan luc, nhan su
nang cap » nang cao, nang cham, nang phap
than cua » thai cua, ban cua, gian cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
cam loc » cam lo
vu bac » vu bach, vu ban, xu bac
loc va » hoc va, luc va
bac ky » cac ky, ban ky, sac ky
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 bac ky ((nang cai) or (nang cap)) hoi. hieu va cam loc va hanh ((than cua) or (nhan cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bac ky ((nang cai) OR (nang cap)) hoi. hieu va cam loc va hanh ((than cua) OR (nhan cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu bac ky ((nang cai) or (nang cap)) hoi. hieu va cam loc va hanh ((than cua) or (nhan cua)) triet*.