Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc day » thuc day, thuoc dac, thuoc dang
thanh ve » thanh va, thanh vien, thanh ha
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
cai ky » cao ky, cac ky, cam ky
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, ma hoa
tu cai » tu cac, tu can, tu bai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang ma hoi. lieu va nam thuoc day ((((thanh ve) OR (hanh ve))) OR (thanh van)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky nang ma hoi. lieu va nam thuoc day ((((thanh ve) OR (hanh ve))) or (thanh van)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang ma hoi. lieu va nam thuoc day ((((thanh ve) OR (hanh ve))) or (thanh van)) cua tre*.