Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham luc » cham soc, cham cuu, chat lua
thanh ly » thanh lay, thanh ky, thanh le
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ly cua » le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky sang ma hoa. hieu ve ((cham luc) or (((nhan luc) OR (nang luc)))) gia thanh ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang ma hoa. hieu ve ((cham luc) OR (((nhan luc) OR (nang luc)))) gia thanh ly cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky sang ma hoa. hieu ve ((cham luc) or (((nhan luc) OR (nang luc)))) gia thanh ly cua tre*".