Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thau xay » thuat xay, tu xay, phan xay
danh sai » dung sai, danh bat, danh dau
thu sach » tu sach, thuat sach, thuoc sach
hiem he » hiem xe, hieu he, thien he
sach ky » sac ky, sach y, sach ty
hieu le » hieu ve, hieu he, hieu ly
nang ma » tang ma, sang ma, nang cao
sai cua » dai cua, hai cua, lai cua
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: thu sach ky nang ma hoa. ((hieu le) or (hiem he)) nam ((thu xa) or (thau xay)) danh sai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoa. ((hieu le) OR (hiem he)) nam ((thu xa) OR (thau xay)) danh sai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoa. ((hieu le) or (hiem he)) nam ((thu xa) or (thau xay)) danh sai cua triet*.