Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cham sat » cham mat, cham soc, khao sat
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sat van » sat va, hat van, hoat van
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 sat van hanh vi luy tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang xa) or (lang van)) hoi. hieu va cham sat van hanh vi luy tre*.