Perhaps you should try some spelling variations:
da phuong » dia phuong, dan phuong, day phuong
xa huong » xa phuong, va huong, ga huong
xa muong » ca muong, xa truong, xa dong
so sach » so sanh, bo sach, co sach
doi cua » dai cua, hoi cua
sach ky » sac ky, sach y, sach ty
pham tu » phan tu, pham thi, pham tai
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
v pham » vi pham, d pham
hieu v » hieu va, hieu ve, hieu 2

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 ky nang cao hoi. hieu v pham tu ((((xa huong) OR (xa muong))) or (da phuong)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang cao hoi. hieu v pham tu ((((xa huong) OR (xa muong))) OR (da phuong)) doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang cao hoi. hieu v pham tu ((((xa huong) OR (xa muong))) or (da phuong)) doi cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang cao hoi. hieu v pham tu ((((xa huong) OR (xa muong))) or (da phuong)) doi cua tre*.