Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
thu sach » thuat sach, thuoc sach, thu hoach
cham cuc » cham cuu, pham cuc, pham chuc
hanh tai » thanh tai, hang tai, han tai
cuc ban » cua ban, cac ban, cuu ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) ky nang ma hoi. hieu ve cham cuc ban ((thanh dat) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang ma hoi. hieu ve cham cuc ban ((thanh dat) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ky nang ma hoi. hieu ve cham cuc ban ((thanh dat) or (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ky nang ma hoi. hieu ve cham cuc ban ((thanh dat) or (hanh tai)) cua tre*.