Perhaps you should try some spelling variations:
sach ty » sach y, sach tu, sach thu
hai cua » thai cua, dai cua, hoi cua
bai cua » ban cua, dai cua, bai ca
te sach » toc sach
hieu he » hieu ve, hiem he, hieu le
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
he nam » ha nam, nghe nam
ma hoi » mai hoi, xa hoi, ma hoa
thu xa » thu xac, thu ha, 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: te sach ty nang ma hoi. hieu he nam ((thu xa) OR (thu xe)) danh ((bai cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu he nam ((thu xa) OR (thu xe)) danh ((bai cua) OR (hai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. hieu he nam ((thu xa) OR (thu xe)) danh ((bai cua) or (hai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu he nam ((thu xa) OR (thu xe)) danh ((bai cua) or (hai cua)) triet*.