Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc thanh » hoan thanh, hoc phan, ha thanh
hoc nhanh » hoc nganh, hoc phan
phan van » pham van, thanh van, luan van
van phan » van phong, van thanh, luan phan
thuoc ma » hoc ma, duoc ma
sach hoi » sach doi, sach moi, cach thoi
hoi van » hoi va, hoi dan, hai van
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
hoi tap » hoi dap, hoc tap, hoi tai
ma hoi » mai hoi, xa hoi, ma hoa

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 hoi tap, nghien cuu mon ((hoc thanh) or (hoc nhanh)) dong thuoc ma hoi van phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cuu mon ((hoc thanh) OR (hoc nhanh)) dong thuoc ma hoi van phan van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu mon ((hoc thanh) or (hoc nhanh)) dong thuoc ma hoi van phan van*.