Perhaps you should try some spelling variations:
hanh loc » thanh loi, hanh duoc, nhanh doc
thanh ve » hanh ve, thanh va, thanh vien
thanh vi » hanh vi, thanh va, nhanh vi
qua hanh » quan hanh, qua thanh, qua danh
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
can ky » van ky, ban ky, tan ky
loc va » hoc va, luc va
dan ky » van ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((can ky) or (dan ky)) lang xa hoi. hieu qua hanh loc va ((thanh vi) or (thanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((can ky) OR (dan ky)) lang xa hoi. hieu qua hanh loc va ((thanh vi) OR (thanh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) or (dan ky)) lang xa hoi. hieu qua hanh loc va ((thanh vi) or (thanh ve)) cua tre*.