Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang cao hoi. thien van nam ((luc van) OR (duc van)) hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. thien van nam ((luc van) OR (duc van)) hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. thien van nam ((luc van) OR (duc van)) hanh vi ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. thien van nam ((luc van) OR (duc van)) hanh vi ((cua triet) or (su triet))*.