Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
chat cua » nhat cua, chat va, chat huu
dang xay » dang van, van xay
dan hanh » dang hanh, dan khanh, ban hanh
hieu van » hieu va, thien van, lieu va
van chat » cao chat
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ve cua » le cua, de cua, te cua
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dan thanh)) ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky ((nang xa) OR (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dan thanh)) ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dan thanh)) ve cua tre".
• Adding a wildcard symbol may retrieve word variants: tu van ky ((nang xa) or (dang xay)) hoi. hieu van chat cua ((dan hanh) OR (dan thanh)) ve cua tre*.