Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
tu sach » thu sach, su sach, tu cach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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) or (te sach)) ty nang ma hoi. hieu ve cham luc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang ma hoi. hieu ve cham luc va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang ma hoi. hieu ve cham luc va hanh va cua tre*.