Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
nhan luc » nang luc
cau tren » cu tren, dau tren, ca tren
dang xay » dang van, van xay
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
va nhan » van nhan, ca nhan, va phan
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, va dau

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