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

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) or (va danh)) vi cua tuc~.
• 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) OR (va danh)) vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu ((sai ky) or (sac ky)) sang dai hoi. hieu su can xuc ((va hanh) or (va danh)) vi cua tuc*.