Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van anh
cac luoc » cac nuoc, cac cuoc, cac quoc
luoc van » luoc can, luoc va, luc van
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
san ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((san ky) OR (sang ky)) nang xa hoi. hieu viec cac luoc van hanh ((vai cua) or (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((san ky) OR (sang ky)) nang xa hoi. hieu viec cac luoc van hanh ((vai cua) OR (hai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((san ky) OR (sang ky)) nang xa hoi. hieu viec cac luoc van hanh ((vai cua) or (hai cua)) te*".