Perhaps you should try some spelling variations:
thu san » thuy san, thu ban, phu san
va hanh » van hanh, va thanh, ban hanh
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu so
can xuc » cam xuc, chat xuc, can xung
va danh » va dinh, va dan, dia danh
vi cua » vai cua, di cua
su can » su van, su cao, tu can
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ((ky sang) or (ky tang)) lai hoi. hieu su can xuc ((va hanh) OR (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ((ky sang) OR (ky tang)) lai hoi. hieu su can xuc ((va hanh) OR (va danh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ((ky sang) or (ky tang)) lai hoi. hieu su can xuc ((va hanh) OR (va danh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: thu san ((ky sang) or (ky tang)) lai hoi. hieu su can xuc ((va hanh) OR (va danh)) vi cua te*.