Perhaps you should try some spelling variations:
lang dai » lang hai, lang mai, lang chai
sang dai » sang tai, sang mai, hoang dai
chat duc » chat xuc, chat doc, chet duoc
va hanh » van hanh, va thanh, va danh
sang ky » sang kyo, dang ky, tang ky
su chat » su phat, du chat, so chat
hieu su » hieu sau, tieu su, hieu so
vi cua » vai cua, di cua
san ky » van ky, dan ky, ban ky
cua te » cua tu

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

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