Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
hanh va » hanh vi
va nhan » van nhan, ca nhan, va phan
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
cu tren » tu tren, dua tren
luc va » duc va, tuc va, loc va

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 y ((mang xa) or (nang ma)) hoi. lieu va nhan luc va ((hanh va) OR (hang va)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((mang xa) OR (nang ma)) hoi. lieu va nhan luc va ((hanh va) OR (hang va)) cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((mang xa) or (nang ma)) hoi. lieu va nhan luc va ((hanh va) OR (hang va)) cu tren*".