Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
dau duc » dao duc, dang duc, dau nuoc
duc van » duc va, duc tan, duc manh
hanh vu » hanh va, hanh tu, hanh ve
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. ((thien van) or (thi van)) dau duc van ((hanh vu) OR (hanh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((thien van) OR (thi van)) dau duc van ((hanh vu) OR (hanh vi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((thien van) or (thi van)) dau duc van ((hanh vu) OR (hanh vi)) va triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((thien van) or (thi van)) dau duc van ((hanh vu) OR (hanh vi)) va triet*.