Perhaps you should try some spelling variations:
thien thien » thien nhien, thien chien, thi thien
thien cac » hien cac, thien cau, thieu cac
hang tai » hang va, dung tai
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac luc » cau luc, coc luc, cac nuoc
va hang » van hang, va nang, va lang
luc va » duc va, tuc va, loc va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. thien thien cac luc va hang tai ((su triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thien thien cac luc va hang tai ((su triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thien thien cac luc va hang tai ((su triet) or (va thiet))*.