Perhaps you should try some spelling variations:
thanh lay » thanh lap, thanh tay, thanh lam
toc sach » hoc sach, doc sach, thuoc sach
cham cuu » cap cuu, chat cua
thanh ly » thanh ky, thanh le, khanh ly
nhan luc » nang luc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet

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 nang ma hoa. hieu ve ((cham cuu) or (nhan luc)) va ((thanh ly) or (thanh lay)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoa. hieu ve ((cham cuu) OR (nhan luc)) va ((thanh ly) OR (thanh lay)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoa. hieu ve ((cham cuu) or (nhan luc)) va ((thanh ly) or (thanh lay)) cua tre*.