Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dieu cua » dieu tra
cham cuu » cap cuu, chat cua
van han » van hanh, van phan, van nhan
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
sac ky » cac ky, sai ky
va han » va phan, va hanh, va hang
ma hoi » mai hoi, xa hoi, ma hoa
te sac » te sach, te cac, te san

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 nang ma hoi. ((hieu ve) or (hieu van)) cham cuu ((va han) or (van han)) dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang ma hoi. ((hieu ve) OR (hieu van)) cham cuu ((va han) OR (van han)) dieu cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. ((hieu ve) or (hieu van)) cham cuu ((va han) or (van han)) dieu cua tre*.