Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
thanh van » thanh san, thanh toan, thanh phan
cac cong » cua cong
cong moi » cong goi, cong mi, cong mot
ba thanh » ban thanh, bac thanh, va thanh
su sach » vu sach
so sach » so sanh, bo sach, co sach
moi tap » moi tai, toi tap
moi dan » moi dang, hoi dan, doi dan
dan hoa » danh hoa, dan hoat, dan khoa
hoc vat » hoc va, hoc viet, thuc vat
vat hai » van hai, dat hai, gat hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) moi tap, nghien cac cong moi dan hoa hoc vat hai ba thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) moi tap, nghien cac cong moi dan hoa hoc vat hai ba thanh van.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) moi tap, nghien cac cong moi dan hoa hoc vat hai ba thanh van*.