Perhaps you should try some spelling variations:
voi doanh » von doanh, tri doanh, hoa doanh
hieu van » thien van, lieu va, hieu ve
cham luc » cham soc, nhan luc, cham cuu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
luc voi » luc moi, luc doi, luc khoi
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet

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 ky nang xa hoi. ((hieu va) or (hieu van)) cham luc voi doanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu va) OR (hieu van)) cham luc voi doanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu va) or (hieu van)) cham luc voi doanh tai cua tre*.