Perhaps you should try some spelling variations:
thien van » thi van
cua triet » su triet, va triet
nang van » dang van, tang van, lang van
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van hoe » van hoa, van hoc, van hieu
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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

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