Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
van hanh » van thanh, ban hanh, van anh
hanh de » hanh ve, hanh kem
luc van » luoc van, luu van, duc van
hau luc » hau loc, cau luc, nhan luc
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
de cua » le cua, te cua, dieu cua
cua tu » cua tuc, cua su, cua cu

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