Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
cua viet » ca viet, hoa viet, cua vat
thu san » thuy san, thu ban, thuat san
phu san » phi san, thuy san
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cai » qua hai, qua cac, qua ca
cai duc » cao duc, mai duc, hoai duc
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu san) OR (phu san)) ky lang xa hoi. hieu qua cai duc tan hanh di cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu san) OR (phu san)) ky lang xa hoi. hieu qua cai duc tan hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((thu san) OR (phu san)) ky lang xa hoi. hieu qua cai duc tan hanh di cua viet*.