Perhaps you should try some spelling variations:
vu cham » va cham, vu kham, tu cham
tuan te » tuan le, tuan ts, tuan tu
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
hieu vu » hieu va, hieu ve, hieu su
dung ha » dung va, dung he, dung khoa
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) OR (sai ky)) dung ha noi. hieu vu cham ((xuc van) or (duc van)) tuan te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (sai ky)) dung ha noi. hieu vu cham ((xuc van) OR (duc van)) tuan te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) OR (sai ky)) dung ha noi. hieu vu cham ((xuc van) or (duc van)) tuan te cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) OR (sai ky)) dung ha noi. hieu vu cham ((xuc van) or (duc van)) tuan te cua tre*.