Perhaps you should try some spelling variations:
van trieu » tan trieu, van tieu, van hieu
tan hanh » tan thanh, tang hanh, toan hanh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
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. ((hieu ve) OR (hieu va)) cam duc tan hanh vi van trieu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu ve) OR (hieu va)) cam duc tan hanh vi van trieu".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu ve) OR (hieu va)) cam duc tan hanh vi van trieu*.