Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
phan khong » phan hong, nhan khong, pham khong
cach thuc » anh thuc, cac thu
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc phan » hoc dan, hoc pho
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan dan » phan dau, gian dan, nhan tai
cuu hoa » cuu khoa, cuu hoan, cau hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((dich hoc) or (cach thuc)) tap, nghien cuu hoa hoc phan khong thuoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dich hoc) OR (cach thuc)) tap, nghien cuu hoa hoc phan khong thuoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((dich hoc) or (cach thuc)) tap, nghien cuu hoa hoc phan khong thuoc xa hoi ca nhan dan*.