Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
phat xuc » chat xuc, phat xuat, phap xu
sang dai » sang tai, lang dai, sang mai
va hanh » va thanh, va danh, ban hanh
su phat » su pham, tu phat, xu phat
hieu su » hieu sau, tieu su, hieu so
dai hai » dai han, dai hoi, dai tai
san ky » sang ky, van ky, ban ky
dan ky » van ky
vi cua » vai cua, di cua
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) or (dan ky)) sang dai hai. hieu su phat xuc ((va hanh) OR (van hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((san ky) OR (dan ky)) sang dai hai. hieu su phat xuc ((va hanh) OR (van hanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((san ky) or (dan ky)) sang dai hai. hieu su phat xuc ((va hanh) OR (van hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((san ky) or (dan ky)) sang dai hai. hieu su phat xuc ((va hanh) OR (van hanh)) vi cua te*.