Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va cham » va chat, va tham
va tinh » may tinh
so sach » so sanh, bo sach, co sach
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
tinh di » tinh doi, trinh di, tinh da
cua te » cua tu
luc va » duc va, tuc va, loc va
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (so sach)) ky nang o hoi. hieu va cham luc va tinh di ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (so sach)) ky nang o hoi. hieu va cham luc va tinh di ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (so sach)) ky nang o hoi. hieu va cham luc va tinh di ((cua tre) OR (cua te))*".