Perhaps you should try some spelling variations:
hanh bac » nhanh bac, thanh bac, hanh cac
thi hanh » thi thanh
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc manh, duc phan
cuc tre » duc tre, cua tre, cuu tre

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (lang xa)) hoi. thi hanh bac ((duc van) OR (duc tan)) hanh tai cuc tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang xa) OR (lang xa)) hoi. thi hanh bac ((duc van) or (duc tan)) hanh tai cuc tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) OR (lang xa)) hoi. thi hanh bac ((duc van) or (duc tan)) hanh tai cuc tre*.