Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu san » hieu van, hieu sau, chieu sang
thanh va » thanh van, hanh va, thanh ha
su triet » su viet, su tien, ve triet
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
duc ban » duc tan, duc van, dua ban
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
pham » phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu san)) ky nang xa hoi. hieu san pham duc ban thanh va ((su triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang xa hoi. hieu san pham duc ban thanh va ((su triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang xa hoi. hieu san pham duc ban thanh va ((su triet) or (cua viet))*.