Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
sach hoc » cach hoc, sach hoi, mach hoc
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
tinh van » dinh van, tinh va, tich van
vu sach » vu bach, su sach, vu khach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc xa » hoc ma
ho cuu » ho chu, ho cua, so cuu
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: vu sach hoc tap, nghien cuu mon hoc dan khoa hoc xa ho cuu ((tinh van) or (trinh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach hoc tap, nghien cuu mon hoc dan khoa hoc xa ho cuu ((tinh van) OR (trinh van)).
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu mon hoc dan khoa hoc xa ho cuu ((tinh van) or (trinh van))*.