Perhaps you should try some spelling variations:
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 nhan » van phan, danh nhan, van khanh
so sach » so sanh, bo sach, co sach
hoi tap » hoi dap, hoc tap, hoi tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoc tai » hoc dai, hoc tap, hoc bai
tai hai » thi hai, dai hai, tai ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoi tap, nghien cuu mot hoc manh tuong hoc tai hai ((van nhan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoi tap, nghien cuu mot hoc manh tuong hoc tai hai ((van nhan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: so sach hoi tap, nghien cuu mot hoc manh tuong hoc tai hai ((van nhan) or (van thanh)) van*.