Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
ty hang » ly hang, thi hang, thu hang
hieu de » hieu ve, hieu he, hieu le
de nhan » do nhan, tue nhan, de thanh
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi
dau tre » dau tren, dau tien, cau tren
va dau » va dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc van hanh va dau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty xang) OR (ty hang)) xa hoi. hieu de nhan luc van hanh va dau tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc van hanh va dau tre*.