Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
thuoc sinh » hoc sinh, thu sinh, thuoc sach
pho thong » he thong
khoi phan » hoi phan, phoi phan, hoc phan
hoach va » hoach xay, hanh va, doanh va
va thuoc » va thuc, va thuong, nha thuoc
sach dao » lanh dao
cac khoi » cac thoi, cac khoan, cach thoi
tu sach » thu sach, su sach, te sach
dao hoc » dai hoc, dan hoc, day hoc
hoc cac » hoc cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach va thuoc sinh hoc pho thong ) or ( tu sach dao hoc cac khoi phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach va thuoc sinh hoc pho thong ) OR ( tu sach dao hoc cac khoi phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach va thuoc sinh hoc pho thong ) or ( tu sach dao hoc cac khoi phan thong ))*.