Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach dao » lanh dao
khoa hoc » hoa hoc
cua pham » cua phap, cua ham, cua phan
dao tai » dao thai, dao tao, cao tai
cuu mon » cuu mo, cuu cong, cuu tong
cuu mot » cua mot, cuu mo, huu mot
hoi cua » hoi chuc
hoc da » hoc dan, hoc dai, hoc dat
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach dao tai, nghien ((cuu mon) or (cuu mot)) hoc da khoa hoc xa hoi cua pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach dao tai, nghien ((cuu mon) OR (cuu mot)) hoc da khoa hoc xa hoi cua pham van.
• Adding a wildcard symbol may retrieve word variants: thu sach dao tai, nghien ((cuu mon) or (cuu mot)) hoc da khoa hoc xa hoi cua pham van*.