Perhaps you should try some spelling variations:
than thong » than thuong, toan thong, tran thong
phan xuong » phan cong
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa than » khoa luan, hoa thai, hoa tan
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
thuc anh » thuc hanh, thuy anh, thu anh
hoa phan » hoa dan, co phan
dao thuc » dan thuc, dao tuc, do thuc
te sach » toc sach
anh hoa » anh khoa, danh hoa, hanh hoa
tu lanh » tu hanh, tu lenh, tu manh

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 bai thuc anh hoa phan xuong ) or ( tu lanh dao thuc bach khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach bai thuc anh hoa phan xuong ) OR ( tu lanh dao thuc bach khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach bai thuc anh hoa phan xuong ) or ( tu lanh dao thuc bach khoa than thong ))*.