Perhaps you should try some spelling variations:
nang han » nang phan, nang hang, nang hanh
han hoi » phan hoi, dan hoi, van hoi
hieu va » lieu va
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

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