Perhaps you should try some spelling variations:
khuan toan » thuat toan, chuan doan, xuan toan
sach thai » sach tham, sac thai, sach tai
thai thuc » thai thuy, thai tuc, tham thuc
anh khuan » anh chuan, anh tuan, anh khoa
phu thong » pho thong, phap thong, khau thong
thuc anh » thuc hanh, thuy anh, thu anh
so sach » so sanh, bo sach, co sach
te lanh » te danh, te lan, tu lanh
tru anh » thu anh, tu anh, trung anh
anh hoa » anh khoa, danh hoa, hanh hoa
hoa phu » khoa phu, hoa phi, hoi phu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach thai thuc anh khuan toan thong ) or ( te lanh dao tru anh hoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach thai thuc anh khuan toan thong ) OR ( te lanh dao tru anh hoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach thai thuc anh khuan toan thong ) or ( te lanh dao tru anh hoa phu thong ))*.