Perhaps you should try some spelling variations:
va thanh » ban thanh, le thanh
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
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: te sach y nang ma hoi. hieu va cam tuc ((((va thanh) OR (va tinh))) or (gia thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu va cam tuc ((((va thanh) OR (va tinh))) OR (gia thanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu va cam tuc ((((va thanh) OR (va tinh))) or (gia thanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu va cam tuc ((((va thanh) OR (va tinh))) or (gia thanh)) hai cua tre*.