Perhaps you should try some spelling variations:
hiem ngheo » giam ngheo, nhiem nghe
ngheo nam » nghe nam, nghiep nam, nghe lam
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc dan » thuoc dang, thuc dan, thuoc ban
cua triet » cua viet, su triet, va triet
hang hoa » hang khoa, thanh hoa, hang va
toc sach » hoc sach, doc sach, thuoc sach
dan hanh » dang hanh, dan khanh, dan thanh
hanh hai » thanh hai, nhanh hai, hang hai
ky hang » ky nang, ly hang, ky dang
hai cua » thai cua, dai cua, hoi cua
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (toc sach)) ky hang hoa hoc. hiem ngheo nam thuoc dan hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (toc sach)) ky hang hoa hoc. hiem ngheo nam thuoc dan hanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (toc sach)) ky hang hoa hoc. hiem ngheo nam thuoc dan hanh hai cua triet*.