Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
cham sac » cham soc, pham sach, cap sac
lang van » dang van, tang van, hoang van
te sach » toc sach
van anh » van thanh, tuan anh, van minh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, dang xay
luy tre » luyen tre
vi luy » vi lua, vi luu

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: te sach ky ((mang xa) OR (lang van)) hoi. hieu va cham sac ((van hanh) OR (van anh)) vi luy tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((mang xa) or (lang van)) hoi. hieu va cham sac ((van hanh) OR (van anh)) vi luy tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang xa) or (lang van)) hoi. hieu va cham sac ((van hanh) OR (van anh)) vi luy tre*.