Perhaps you should try some spelling variations:
hoan thanh » hoang thanh, ban thanh, van thanh
mot hoan » moc hoang, mot doanh, hop hoan
cong hoc » dong hoc, cong hoa, cong coc
van phan » van phong, van thanh, luan phan
phan van » pham van, thanh van, luan van
te sach » toc sach
hoi tai » hoi trac
hoc tai » hoc dai, hoc tap, hoc bai
cuu mot » cua mot, cuu mo, huu mot
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

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

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