Perhaps you should try some spelling variations:
manh tuong » manh tung, manh cuong, minh tuong
tuong hoc » truong hoc, tuong ho, duong hoc
ban thanh » ban hanh, ban hang
sach hoi » sach doi, sach moi, cach thoi
hoc manh » hoc anh, hoc hanh, hoc danh
van phan » van phong, van thanh, luan phan
su sach » so sach, vu sach
hoi tap » hoi dap, hoi tai, hai tap
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
tap bai » toan bai, tap giai

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 tap, nghien cuu mot hoc manh tuong hoc tap bai ((van phan) or (ban thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien cuu mot hoc manh tuong hoc tap bai ((van phan) OR (ban thanh)) van.
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cuu mot hoc manh tuong hoc tap bai ((van phan) or (ban thanh)) van*.