Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cac, va cam, ve cai

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