Perhaps you should try some spelling variations:
thanh lay » thanh lap, thanh tay, thanh lam
va thanh » gia thanh, ban thanh, va tinh
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
cao khoa » lao khoa, bao khoa, cac khoa
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
lay cua » ly cua, day cua, lai cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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