Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu

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) OR (ky tang)) van hoi. hieu va cam tu va hanh vi ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ((ky lang) OR (ky tang)) van hoi. hieu va cam tu va hanh vi ((dua tren) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ((ky lang) OR (ky tang)) van hoi. hieu va cam tu va hanh vi ((dua tren) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu cac ((ky lang) OR (ky tang)) van hoi. hieu va cam tu va hanh vi ((dua tren) or (cua triet))*.