Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
manh tuong » manh tung, manh cuong, minh tuong
tuong hoc » truong hoc, tuong ho, duong hoc
van thanh » ban thanh, van tuan
sach hoi » sach doi, sach moi, cach thoi
hoc manh » hoc anh, hoc hanh, hoc danh
van phan » van phong, luan phan, van ban
su sach » so sach, vu sach
mot hoc » mon hoc, mo hoc, mot goc
tap hai » tap bai, tap dai, tai 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 hoi dap, nghien cua mot hoc manh tuong hoc tap hai ((van phan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi dap, nghien cua mot hoc manh tuong hoc tap hai ((van phan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: su sach hoi dap, nghien cua mot hoc manh tuong hoc tap hai ((van phan) or (van thanh)) van*.