Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
tu sach » thu sach, su sach, te sach
vai cuu » vai cua
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cuu tre » cua tre, cau tren, cau treo

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