Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
cau theo » cau thi, cau tao
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
hai cau » hai chau, hai chu, hai hau
su sach » so sach, vu sach
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ly nang)) cau hoi. hieu va ((nam thuoc) or (nam thuc)) van hanh hai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) cau hoi. hieu va ((nam thuoc) OR (nam thuc)) van hanh hai cau theo.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) cau hoi. hieu va ((nam thuoc) or (nam thuc)) van hanh hai cau theo*.