Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
thuc dang » thuoc dang, thuc dan, thuc dung
su sach » so sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vu sach » vu bach, vu khach
hieu ha » hieu hoa, hieu va, hieu ca
vai su » va su, van su, tai su
ha am » hoa am, ha nam, ha lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) ky lang xa hoi. hieu ha am thuc dang hanh ((vai su) or (lai su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. hieu ha am thuc dang hanh ((vai su) OR (lai su)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky lang xa hoi. hieu ha am thuc dang hanh ((vai su) or (lai su)) triet*".