Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nhan luc » nang luc
hieu ve » hieu va, hieu van
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
ve nhan » ve nha, de nhan, va nhan
ty hang » ly hang, thi hang, thu hang
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
va cuu » va cau, va chu, va huu

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) OR (toc sach)) ((ty xang) or (ty hang)) xa hoi. hieu ve nhan luc va danh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((ty xang) OR (ty hang)) xa hoi. hieu ve nhan luc va danh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((ty xang) or (ty hang)) xa hoi. hieu ve nhan luc va danh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ((ty xang) or (ty hang)) xa hoi. hieu ve nhan luc va danh va cuu tre*.