Perhaps you should try some spelling variations:
vai trien » va trien, cai thien, cai tien
than luc » than duc, thanh luu, thuy luc
hieu van » hieu va, thien van, lieu va
nhan luc » nang luc
ky dang » ky nang, ky danh
dang ba » dang bac, dang bai, dang ha
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, ban hanh
va vai » va bai, va van, va dai
pu xac » su xac
xac ky » cac ky, sac ky, bac ky
ha luc » ha duc
ba hoc » bai hoc, bac hoc, bao hoc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: pu xac ky dang ba hoc. hieu van ((((ha luc) or (than luc))) or (nhan luc)) va hanh va vai trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: pu xac ky dang ba hoc. hieu van ((((ha luc) OR (than luc))) OR (nhan luc)) va hanh va vai trien.
• Adding a wildcard symbol may retrieve word variants: pu xac ky dang ba hoc. hieu van ((((ha luc) or (than luc))) or (nhan luc)) va hanh va vai trien*.