Perhaps you should try some spelling variations:
nguyen luu » nguyen huu, nguyen lieu, nguyen duc
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach doi » sach hoi, sach moi, sach dao
gian dan » gian lang
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
luu van » cuu van, luan van, luu hanh
van hoc » van hoa
hai van » thai van, ha van, hai tan
nhan va » nhan tai, nhan dan, nhan tao
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 doi tap, nguyen luu van hoc doanh hoa hoc ma hai van ((nhan va) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tap, nguyen luu van hoc doanh hoa hoc ma hai van ((nhan va) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: te sach doi tap, nguyen luu van hoc doanh hoa hoc ma hai van ((nhan va) or (gian dan))*.