Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
mai khoi » mai khoa, tai khoa, cac khoi
lai hoi » dai hoi, lai hoa, lai roi
cach tu » cach thuc
tu nang » tru nang, tu nong, tu nano
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
tu cach » tu cac
xuc va » duc va, tuc va, luc 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: tu cach tu nang ((mai khoi) or (lai hoi)). hieu hien cac xuc va hanh ((vi cua) OR (di cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu nang ((mai khoi) OR (lai hoi)). hieu hien cac xuc va hanh ((vi cua) OR (di cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu nang ((mai khoi) or (lai hoi)). hieu hien cac xuc va hanh ((vi cua) OR (di cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu cach tu nang ((mai khoi) or (lai hoi)). hieu hien cac xuc va hanh ((vi cua) OR (di cua)) viet*.