Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
thanh le » thinh le, thanh ve, thanh liem
duc van » duc va, duc tan, duc manh
cua tre » cua te, cua triet, dua tren
te sach » toc sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
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 ve cam duc van ((thanh le) OR (thanh de)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu ve cam duc van ((thanh le) OR (thanh de)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu ve cam duc van ((thanh le) OR (thanh de)) ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ve cam duc van ((thanh le) OR (thanh de)) ((cua tre) or (cuu tre))*.