Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
de cuu » de cua
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sac ky) or (sach y)) nang ma hoi. hieu ve cau luc ((van hanh) OR (van thanh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sac ky) OR (sach y)) nang ma hoi. hieu ve cau luc ((van hanh) OR (van thanh)) de cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) or (sach y)) nang ma hoi. hieu ve cau luc ((van hanh) OR (van thanh)) de cuu tre*".