Perhaps you should try some spelling variations:
nghiep cua » nghiep vua, nghiep luan, nghiep va
gianh lang » gian lang, gian lan, dinh lang
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
va gianh » va gian, van giang, va giai
tu sach » thu sach, su sach, te sach
dan hoc » van hoc, dan toc, dai hoc
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: tu sach hoc tap, ((nghien cuu) or (nghiep cua)) dan hoc doanh hoa hoc xa hoi va gianh lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, ((nghien cuu) OR (nghiep cua)) dan hoc doanh hoa hoc xa hoi va gianh lang.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, ((nghien cuu) or (nghiep cua)) dan hoc doanh hoa hoc xa hoi va gianh lang*.