Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
luc van » luoc van, luu van, duc van
dang xa » dang xay, dang ha, dang va
vai cua » dai cua, hai cua, lai cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
sach vu » sach va, sach tu, sach uu
cau luc » cau truc, cau phuc
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach vu ((dang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh vai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu ((dang xa) OR (lang xa)) hoi. ((hieu va) OR (hieu qua)) cau luc van hanh vai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu ((dang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh vai cua su".
• Adding a wildcard symbol may retrieve word variants: te sach vu ((dang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh vai cua su*.