Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
phan khong » phan hong, nhan khong, pham khong
tren phan » truyen phan, trinh phan, trung phan
sach hoi » sach doi, sach moi, cach thoi
cuu tong » cuu cong, cuu tinh, huu tung
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan van » nhan dan, nhan va, phan van
tu sach » thu sach, su sach, te sach
hoi ca » hoi cua, hoi cac, hoi cau

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 dap, nghien ((cuu tong) or (cua cong)) tren phan khong thuoc xa hoi ca nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien ((cuu tong) OR (cua cong)) tren phan khong thuoc xa hoi ca nhan van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien ((cuu tong) or (cua cong)) tren phan khong thuoc xa hoi ca nhan van*.