Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
cuu tre » cua tre, cau treo
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x hoi. lieu va cham luc ((van hanh) or (ban hanh)) vi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. lieu va cham luc ((van hanh) OR (ban hanh)) vi ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. lieu va cham luc ((van hanh) or (ban hanh)) vi ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. lieu va cham luc ((van hanh) or (ban hanh)) vi ((cuu tre) OR (cau tren))*.