Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
cuu long » cuu cong, cuu tong, cuu nang
long hoc » dong hoc, long soc, long thuoc
khoa hoc » hoa hoc
gian dan » gian lang
su sach » so sach, vu sach
va gian » va gianh, van gian, va giai
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: ((su sach) or (thu sach)) hoc tap, nghien cuu long hoc nganh khoa hoc xa hoi va gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) hoc tap, nghien cuu long hoc nganh khoa hoc xa hoi va gian dan.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) hoc tap, nghien cuu long hoc nganh khoa hoc xa hoi va gian dan*.