Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
hieu he » hieu ve, hiem he, hieu le
thu xac » thau xay
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
he nam » ha nam, nghe nam
thu xa » thu ha, thu xe, thu ba

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

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