Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
cuu cong » cua cong, thu cong, cac cong
cong mot » cong dot, trong mot, cong mong
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
mot dan » mat dan, moi dan, mot lan
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 cuu cong mot 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 cuu cong mot dan hoa hoc vat hai ba thanh van.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) moi tap, nghien cuu cong mot dan hoa hoc vat hai ba thanh van*.