Perhaps you should try some spelling variations:
nhan luc » nang luc
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
nang ma » tang ma, sang ma, nang cao
lang ha » long ha
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
di cua » dai cua, de cua, do cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang ma) or (lang ha)) hoi. hieu va nhan luc va danh ((di cua) OR (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (lang ha)) hoi. hieu va nhan luc va danh ((di cua) OR (doi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) or (lang ha)) hoi. hieu va nhan luc va danh ((di cua) OR (doi cua)) tre*".