Perhaps you should try some spelling variations:
danh sai » dung sai, danh dau, hanh san
danh bat » doanh bat, anh bai, dinh ba
tu cach » tu cac
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ha » hieu hoa, hieu va, hieu ca
cua tre » cua te, cuu tre, cua triet
thu xa » thu xac, thu ha, thu xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang cao hoi. hieu ha nam thu xa ((danh sai) OR (danh bat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang cao hoi. hieu ha nam thu xa ((danh sai) OR (danh bat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang cao hoi. hieu ha nam thu xa ((danh sai) OR (danh bat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang cao hoi. hieu ha nam thu xa ((danh sai) OR (danh bat)) cua tre*.