Perhaps you should try some spelling variations:
da phuong » dia phuong, dan phuong, day phuong
xa huong » xa phuong, va huong, xa muong
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
pham tu » phan tu, pham thi, pham tai
doi cua » hoi cua

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