Perhaps you should try some spelling variations:
tuc dan » thuc dan, thuc day, tung dan
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc tan, duc manh
hanh di » hang di, danh di, xanh di
hanh de » hanh ve, hanh kem
ca viet » va viet, co viet, hoa viet
dan ky » van ky
qua ca » qua cac, qua cua, qua cai
ca duc » cao duc, cua duc, ca dua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuc dan ky lang xa hoi. hieu qua ca duc van ((((hanh di) OR (hanh vi))) or (hanh de)) ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuc dan ky lang xa hoi. hieu qua ca duc van ((((hanh di) OR (hanh vi))) OR (hanh de)) ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuc dan ky lang xa hoi. hieu qua ca duc van ((((hanh di) OR (hanh vi))) or (hanh de)) ca viet".
• Adding a wildcard symbol may retrieve word variants: tuc dan ky lang xa hoi. hieu qua ca duc van ((((hanh di) OR (hanh vi))) or (hanh de)) ca viet*.