Perhaps you should try some spelling variations:
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
su bac » xu bac, du bac, su cac
anh vi » hanh vi, anh va, anh ve
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su bac ((ky tang) or (ky dang)) mai hoi. hieu ve chat ((xuc van) OR (duc van)) anh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su bac ((ky tang) OR (ky dang)) mai hoi. hieu ve chat ((xuc van) OR (duc van)) anh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su bac ((ky tang) or (ky dang)) mai hoi. hieu ve chat ((xuc van) OR (duc van)) anh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: su bac ((ky tang) or (ky dang)) mai hoi. hieu ve chat ((xuc van) OR (duc van)) anh vi hoa viet*.