Perhaps you should try some spelling variations:
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
vai cuu » vai cua
va dinh » van dinh, va kinh, va tinh
vu nhan » cu nhan, vu ngan, tu nhan
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
va dan » ca dan, va dao, 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 ((ty nang) or (ty hang)) xa hoi. hieu vu nhan luc ((va dan) 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 nhan luc ((va dan) 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 nhan luc ((va dan) or (va dinh)) vai cuu tre*.