Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nha thuoc » nha nuoc, nhan thuc, nha hoc
thuoc va » thuc va, thuoc ma, thuong va
cua tren » dua tren, ca tren, cua tre
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, va hanh
danh ve » dinh ve, hanh ve, anh ve
va nha » va nho, ve nha
ve cua » le cua, de cua, te cua
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat sach)) ky nang ((x hoi) or (xa hoi)). lieu va nha thuoc va danh ve cua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang ((x hoi) OR (xa hoi)). lieu va nha thuoc va danh ve cua tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang ((x hoi) or (xa hoi)). lieu va nha thuoc va danh ve cua tren*.