Perhaps you should try some spelling variations:
sach thiet » sach thieu, cach thiet, hanh thiet
thong minh » thong tin, hoang minh
thong tinh » thuong tinh, thong tin, trong tinh
moi thong » hoi thong, moi trong, moi truong
can thong » ban thong, cac thong, van thong
thu sach » tu sach, thuat sach, thuoc sach
thiet ky » thiet ke, thien ky, thiet bi
ky nguoi » ly nguoi, ke nguoi, tay nguoi
cach che » cac che, sach che, cac he
gioi can » gioi van, gioi cam, gioi cau
tu cach » tu cac
me gioi » me giai, ve gioi, me nguoi
che me » che my

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 thiet ky nguoi moi thong minh ) or ( tu cach che me gioi can thong tinh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach thiet ky nguoi moi thong minh ) OR ( tu cach che me gioi can thong tinh )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach thiet ky nguoi moi thong minh ) or ( tu cach che me gioi can thong tinh ))*.