Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu le » hieu ve, hieu he, hieu ly
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
su xac » pu xac, su cac
le am » le ham, le nam, le a
di co » doi co, de co, di o

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ((ky sang) or (ky tang)) ma hoi. hieu le am thuc va hanh ((di co) OR (xi co)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ((ky sang) OR (ky tang)) ma hoi. hieu le am thuc va hanh ((di co) OR (xi co)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ((ky sang) or (ky tang)) ma hoi. hieu le am thuc va hanh ((di co) OR (xi co)) viet".
• Adding a wildcard symbol may retrieve word variants: su xac ((ky sang) or (ky tang)) ma hoi. hieu le am thuc va hanh ((di co) OR (xi co)) viet*.