Perhaps you should try some spelling variations:
ngoc phan » ngoc khanh, ngoc thanh, hoc phan
sanh nhat » san nhat, doanh nhat, dang nhat
hoc hanh » hoc nhanh, hoc thanh, hoc anh
so sanh » do sanh
hanh su » hanh sua, hinh su, hanh tu
su viet » so viet
tu sach » thu sach, su sach, te sach
nha ngu » nhan ngu, nhanh ngu, khau ngu
phan su » phan suc, phan tu, nhan su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh nhat ngu - hoc hanh su viet ) or ( tu sach nha ngu - ngoc phan su viet ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh nhat ngu - hoc hanh su viet ) OR ( tu sach nha ngu - ngoc phan su viet )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh nhat ngu - hoc hanh su viet ) or ( tu sach nha ngu - ngoc phan su viet ))*.