Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
duc van » duc va, duc tan, duc manh
hanh de » hanh ve
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
tu san » thu san, tu can, vu san
ca duc » cao duc, cua duc, ca dua
tu ban » thu ban, te ban
qua ca » qua cac, qua cua, qua cai

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

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