Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
van hanh » van thanh, ban hanh, van anh
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
qua cau » quan cau, qua cac, qua ca
cau tuc » cau truc, cau tu, cau luc
tuc van » thuc van, truc van, tuc va
hanh vu » hanh vi, hanh va, hanh tu
vu va » vu van, tu va, su va

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: su sach ((tay lang) OR (ky nang)) xa hoi. hieu qua cau tuc van hanh vu va trien~.
• Adding a wildcard symbol may retrieve word variants: su sach ((tay lang) or (ky nang)) xa hoi. hieu qua cau tuc van hanh vu va trien*.