Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
chua tre » chua tri, cua tre, chua trieu
so sach » so sanh, bo sach, co sach
cam duc » cao duc, pham duc, nam duoc
va chua » vua chua, ca chua, va chu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (hoc sach)) ky nang x hoi. lieu va ((cam duc) OR (cam xuc)) va thanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (hoc sach)) ky nang x hoi. lieu va ((cam duc) OR (cam xuc)) va thanh va chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (hoc sach)) ky nang x hoi. lieu va ((cam duc) OR (cam xuc)) va thanh va chua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (hoc sach)) ky nang x hoi. lieu va ((cam duc) OR (cam xuc)) va thanh va chua tre*.