Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nhan luc » nang luc
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu
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: toc sach ty nang x hoi. ((hieu va) or (hieu qua)) nhan luc va hanh tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang x hoi. ((hieu va) OR (hieu qua)) nhan luc va hanh tai cua tu.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. ((hieu va) or (hieu qua)) nhan luc va hanh tai cua tu*.