Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, nam thuc, dam thuc
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
tu hanh » du hanh, lu hanh, thuc hanh
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu hanh xa hoi. hieu ve ((((cam tuc) or (nam thuoc))) or (cam tu)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu hanh xa hoi. hieu ve ((((cam tuc) OR (nam thuoc))) OR (cam tu)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu hanh xa hoi. hieu ve ((((cam tuc) or (nam thuoc))) or (cam tu)) va hanh dai cua tre*.