Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
te sach » toc sach
thi cuu » thi cuc, thi huu, thi cu
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va cao » va co, va dao, va bao
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 cao) OR (va cac)) tuc ((va thanh) or (gia thanh)) thi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu ((va cao) OR (va cac)) tuc ((va thanh) OR (gia thanh)) thi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu ((va cao) OR (va cac)) tuc ((va thanh) or (gia thanh)) thi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ((va cao) OR (va cac)) tuc ((va thanh) or (gia thanh)) thi cuu tre*.