Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
chau tinh » cuu tinh, ha tinh, cua tinh
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
san khoa » toan khoa, hang khoa, da khoa
khoa hoc » hoa hoc
mot hoc » mon hoc, mo hoc, mot goc
hoc san » hoc dan, toc san, hoc can
ho chau » ha chau, ho chu, o chau
tinh va » tich va, trinh van, trinh vat
hoc xa » hoc ma
xa ho » xa hoi, xa hoa, xa hoc

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) or (mach hoc)) tap, nghien cua mot hoc san khoa hoc xa ho chau tinh va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (mach hoc)) tap, nghien cua mot hoc san khoa hoc xa ho chau tinh va.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (mach hoc)) tap, nghien cua mot hoc san khoa hoc xa ho chau tinh va*.