Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
cua te » cua 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 ((ky lang) OR (ky tang)) xa hoi. lieu va ((nam thuoc) or (am thuc)) va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) xa hoi. lieu va ((nam thuoc) OR (am thuc)) va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky tang)) xa hoi. lieu va ((nam thuoc) or (am thuc)) va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky tang)) xa hoi. lieu va ((nam thuoc) or (am thuc)) va hanh tai cua te*.