Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
van hanh » van thanh, ban hanh, van anh
hieu su » hieu sau, tieu su, hieu so
va hanh » va thanh, va danh, ban hanh
dai hai » dai han, dai hoi, dai tai
di cua » dai cua, doi cua, de cua
su cam » su nam, su cao, su can
sac ky » cac ky
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: tu ((sai ky) or (sac ky)) sang dai hai. hieu su cam xuc ((va hanh) or (van hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sai ky) OR (sac ky)) sang dai hai. hieu su cam xuc ((va hanh) OR (van hanh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sai ky) or (sac ky)) sang dai hai. hieu su cam xuc ((va hanh) or (van hanh)) di cua te*.