Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
van dau » van dao, phan dau
dau luc » cau luc, dau luan, dau nuoc
luc van » luoc van, luu van, duc van
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
v nang » va nang, van nang, voi nang
de cua » le cua, te cua, dieu cua

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 ((v nang) or (vu nang)) xa hoi. hieu van dau luc van hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu nang)) xa hoi. hieu van dau luc van hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu nang)) xa hoi. hieu van dau luc van hanh de cua tre*.