Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cao hoa » cao hoat, cao khoa, cau hoa

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 cao hoa. hieu ve ((cham luc) or (nhan luc)) va thanh ((ly cua) OR (le cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang cao hoa. hieu ve ((cham luc) OR (nhan luc)) va thanh ((ly cua) OR (le cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang cao hoa. hieu ve ((cham luc) or (nhan luc)) va thanh ((ly cua) OR (le cua)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang cao hoa. hieu ve ((cham luc) or (nhan luc)) va thanh ((ly cua) OR (le cua)) tre*.