Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
tu cach » tu cac
tinh de » tinh da, sinh de, tinh he
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach
su sach » vu sach
luc va » duc va, tuc va, loc va
de cua » le cua, te cua, dieu cua
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: ((tu cach) or (((su sach) OR (so sach)))) ky nang x hoi. hieu qua cham luc va tinh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((su sach) OR (so sach)))) ky nang x hoi. hieu qua cham luc va tinh de cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (((su sach) OR (so sach)))) ky nang x hoi. hieu qua cham luc va tinh de cua tre*".