Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
nhan luc » nang luc
chat luc » chat xuc, chat lua, chat huu
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) OR (sac ky)) sang ma hoa. hieu ve ((chat luc) or (nhan luc)) ban thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sac ky)) sang ma hoa. hieu ve ((chat luc) OR (nhan luc)) ban thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) OR (sac ky)) sang ma hoa. hieu ve ((chat luc) or (nhan luc)) ban thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) OR (sac ky)) sang ma hoa. hieu ve ((chat luc) or (nhan luc)) ban thanh vi cua vat*.