Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cham oc » cham soc, cham o, cham hoi
luy tre » luyen tre
oc van » hoc van, luoc van, quoc van
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 may) OR (lang van)) hoi. hieu va cham oc van hanh vi luy tre~.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang may) or (lang van)) hoi. hieu va cham oc van hanh vi luy tre*.