Perhaps you should try some spelling variations:
nganh dong » nganh cong, nhanh dong, nganh nong
dong thuoc » dung thuoc, dang thuoc, don thuoc
thanh nhan » thanh phan, thanh san, thanh toan
hoc nganh » hoc nhanh
sach dai » sach dao, sach bai, sach dat
thuoc xa » thuoc ma, thuoc va, thuoc la
tu sach » thu sach, su sach, te sach
dai tai » dai hai, dai thao
cuu hoa » cuu khoa, cuu hoan, cau hoa
va phan » van phan, va phat, va phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach dai tai, nghien cuu hoa hoc nganh dong thuoc xa hoi ((va phan) or (thanh nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach dai tai, nghien cuu hoa hoc nganh dong thuoc xa hoi ((va phan) OR (thanh nhan)) van.
• Adding a wildcard symbol may retrieve word variants: tu sach dai tai, nghien cuu hoa hoc nganh dong thuoc xa hoi ((va phan) or (thanh nhan)) van*.