Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
lap cua » lai cua, tap cua, lam cua
va cham » va chat, va tham
vu cham » vu kham, tu cham, qua cham
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
ty tang » tay tang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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 ty tang ((ma hoi) OR (mai hoi)). hieu ((vu cham) or (va cham)) duc va thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang ((ma hoi) OR (mai hoi)). hieu ((vu cham) OR (va cham)) duc va thanh lap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty tang ((ma hoi) OR (mai hoi)). hieu ((vu cham) or (va cham)) duc va thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty tang ((ma hoi) OR (mai hoi)). hieu ((vu cham) or (va cham)) duc va thanh lap cua tre*.