Perhaps you should try some spelling variations:
luat ngan » cua ngan, luat dan
luc nhan » luc nhat, cu nhan, tue nhan
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va dau » va dao
va cau » van cau, va cac, va cao
x hoi » xa hoi, o hoi, x ho
hang » dang, bang, hanh

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 x hoi. hieu va dau ((luc nhan) or (luat ngan)) hang va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu va dau ((luc nhan) OR (luat ngan)) hang va cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu va dau ((luc nhan) or (luat ngan)) hang va cau tren*.