Perhaps you should try some spelling variations:
dieu cua » dieu tra
chat cua » nhat cua, chat va, chat huu
cham cuu » cap cuu
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van han » van hanh, van phan, van nhan
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
va han » va phan, va hanh, va hang
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 ky nang ma hoi. hieu ve ((cham cuu) OR (chat cua)) ((va han) or (van han)) dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ve ((cham cuu) OR (chat cua)) ((va han) OR (van han)) dieu cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ve ((cham cuu) OR (chat cua)) ((va han) or (van han)) dieu cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ve ((cham cuu) OR (chat cua)) ((va han) or (van han)) dieu cua tre*.