Perhaps you should try some spelling variations:
lang phi » lang phu, lang chai, lang ha
dang cap » nang cap, dang ca, dang cac
cap phoi » cap cho
su sach » so sach
phi cua » phai cua, chi cua, khi cua
duc ban » duc van, dua ban, duc man
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ve cao » va cao, ve bao, ve cac

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 dang cap phoi. hieu ve cao ((duc ban) or (duc tan)) lang phi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky dang cap phoi. hieu ve cao ((duc ban) OR (duc tan)) lang phi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky dang cap phoi. hieu ve cao ((duc ban) or (duc tan)) lang phi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky dang cap phoi. hieu ve cao ((duc ban) or (duc tan)) lang phi cua tre*.