Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
hieu su » hieu sau, tieu su, hieu so
can xuc » cam xuc, chat xuc, can xung
va hanh » van hanh, va thanh, va danh
dai hoi » dai hoc, dai hai, dai moi
xuc va » duc va, tuc va, luc va
su can » su van, su cao, tu can
sac ky » cac ky
cua tu » cua tuc, cua su, cua cu

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

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