Perhaps you should try some spelling variations:
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
ly hang » ly quang
hieu de » hieu ve, hieu he, hieu le
de nhan » do nhan, tue nhan, de thanh
va doan » va doanh, van doan, va dan
cau tre » cau tren, cau treo, cau tra
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, 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 (ly hang)) xa hoi. hieu de nhan luc va doan va cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ly hang)) xa hoi. hieu de nhan luc va doan va cau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ly hang)) xa hoi. hieu de nhan luc va doan va cau tre*.