Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
danh hai » dang hai, lanh hai, danh hau
te sach » toc sach
hieu he » hieu ve, hiem he, hieu le
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
he nam » ha nam, nghe nam
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: ((te sach) or (su sach)) ky sang ma hoi. hieu he nam thu xa ((danh hai) OR (manh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) ky sang ma hoi. hieu he nam thu xa ((danh hai) OR (manh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (su sach)) ky sang ma hoi. hieu he nam thu xa ((danh hai) OR (manh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) ky sang ma hoi. hieu he nam thu xa ((danh hai) OR (manh hai)) cua tre*.