Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua than » qua thanh, qua phan, qua tan
ban hanh » ban hang
dang xay » dang van, van xay
qua tham » qua cham, qua thanh, quan pham
hanh va » hang va, hanh vi
luu ban » luu bang, luu van, luu dan
lang xa » lang ha, lang van
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((lang xa) OR (dang xay)) hoi. hieu ((qua tham) or (qua than)) luu ban hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((lang xa) OR (dang xay)) hoi. hieu ((qua tham) OR (qua than)) luu ban hanh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((lang xa) OR (dang xay)) hoi. hieu ((qua tham) or (qua than)) luu ban hanh va cua triet*".