Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
thien van » thi van
su triet » su viet, su tien, ve triet
tien su » thien su, tieu su, nien su
tu bac » tu ban, tu cac, tu bat
tu san » thu san, tu ban, tu can
tuc va » thuc va, truc va, duc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu san)) ky nang x hoi. thien van nam ((tuc va) OR (tuc xa)) thanh tien su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu san)) ky nang x hoi. thien van nam ((tuc va) OR (tuc xa)) thanh tien su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu san)) ky nang x hoi. thien van nam ((tuc va) OR (tuc xa)) thanh tien su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu san)) ky nang x hoi. thien van nam ((tuc va) OR (tuc xa)) thanh tien su triet*.