Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoa doanh » toan doanh, hoa dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
cong hoa » dong hoa, dong hoc, hang hoa
thai van » thai vung, thai den, thai son
thi van » thi lan, thi hanh, thi nang
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 thu cong hoa doanh hoa hoc xa ((thai van) or (thi van)) thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien thu cong hoa doanh hoa hoc xa ((thai van) OR (thi van)) thanh van.
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien thu cong hoa doanh hoa hoc xa ((thai van) or (thi van)) thanh van*.