Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
te sach » toc sach
ky dang » ky danh
hieu ve » hieu va, hieu van
tuc xay » thuc xay, tuc xa, tac xay
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ve nam » he nam, va nam, le nam

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

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