Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
tu cach » tu cac
tinh vi » trinh vi, tinh voi, tinh va
cam cua » ca cua, nam cua, cau cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
luu tre » luu tru, cuu tre, luy tre
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
te sach » toc sach
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) OR (te sach)) ky dang xa hoi. ((hieu ve) OR (hieu va)) cam cua ban tinh vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) OR (te sach)) ky dang xa hoi. ((hieu ve) OR (hieu va)) cam cua ban tinh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) OR (te sach)) ky dang xa hoi. ((hieu ve) OR (hieu va)) cam cua ban tinh vi luu tre*.