Perhaps you should try some spelling variations:
thuc thien » thuc hien, thua thien, thuc tien
thien cac » hien cac, thien cau, thieu cac
hoat toan » hoa toan, thuat toan, hoach toan
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach khoa » bach khoa, sach nha, anh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
can thuc » dan thuc, van thuc, cay thuc
cac hoat » cao hoat, cac khoan, cac thuat
sach dao » lanh dao
dao nuoc » dat nuoc, dao cuoc, dau nuoc
khoa hoc » hoa hoc
tu sach » thu sach, su sach, te sach
su can » su van, su cao, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su can thuc thien cac hoat toan thong ) or ( tu sach dao nuoc sach khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su can thuc thien cac hoat toan thong ) OR ( tu sach dao nuoc sach khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( su can thuc thien cac hoat toan thong ) or ( tu sach dao nuoc sach khoa hoc thong ))*.