Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
khoa hoc » hoa hoc
hai van » thai van, ha van, hao van
hai tan » hai quan
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoc tap, nghien cuu long soc doanh khoa hoc xa ((hai van) OR (hai tan)) thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoc tap, nghien cuu long soc doanh khoa hoc xa ((hai van) OR (hai tan)) thanh van".
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien cuu long soc doanh khoa hoc xa ((hai van) OR (hai tan)) thanh van*.