Perhaps you should try some spelling variations:
te sach » toc sach
nang xa » nang x, lang xa, nang ma
van hac » van hoc, van ha, van hai
van dau » van dao, phan dau
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
xuc va » tuc va, luc va, xac va
vi luu » vi lua

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