Perhaps you should try some spelling variations:
lieu quan » lien quan, lieu van
dang xay » dang van, van xay
tham doc » than doc, tham do, tham nuoc
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, lang van
sac ky » cac ky, sai ky
doc va » duoc va, hoc va, duc va
vi cuu » vi luu, vinh cuu
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 ((lang xa) or (dang xay)) hoi. ((lieu quan) or (hieu qua)) tham doc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((lang xa) OR (dang xay)) hoi. ((lieu quan) OR (hieu qua)) tham doc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((lang xa) or (dang xay)) hoi. ((lieu quan) or (hieu qua)) tham doc va hanh vi cuu tre*.