Perhaps you should try some spelling variations:
sach hoc » cach hoc, sach hoi, mach hoc
hoc dang » hoc dan, hoc bang, hoc tang
hoc dung » hoc ung, hoc dan, tac dung
khoa hoc » hoa hoc
tinh van » trinh van, dinh van, tinh va
vu sach » vu bach, su sach, vu khach
cuu mon » cuu mo, cuu mot, cuu cong
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 dang) OR (hoc dung)) khoa hoc xa ho cuu tinh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach hoc tap, nghien cuu mon ((hoc dang) OR (hoc dung)) khoa hoc xa ho cuu tinh van".
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu mon ((hoc dang) OR (hoc dung)) khoa hoc xa ho cuu tinh van*.