Perhaps you should try some spelling variations:
toan hanh » toan thanh, toan anh, tran hanh
cua viet » ca viet, hoa viet, cua vat
duc toan » duc tan, duc ton, duc hoan
qua cac » cua cac
hanh di » hanh vi, hanh de, hang di
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
di cua » dai cua, doi cua, de cua
vu san » va san, vu ban
qua ca » qua cua, qua cai, quan cau
tu can » tu ban, tu cac, thu canh

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

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