Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
nhan luc » nang luc
hieu de » hieu ve, hieu he, hieu le
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
de nhan » do nhan, tue nhan, de thanh
tu sach » su sach, te sach, tu cach
ty hang » ly hang, thi hang, thu hang
cau tre » cau tren, cau treo, cau tra
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: ((tu sach) OR (thu sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va danh va cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((ty xang) OR (ty hang)) xa hoi. hieu de nhan luc va danh va cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va danh va cau tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va danh va cau tre*.