Perhaps you should try some spelling variations:
doi nang » dai nang, hoi nang, voi nang
tu sach » thu sach, su sach, tu cach
hanh va » hang va
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) doi nang xa hoi. hieu va cam xuc va ((hanh vi) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) doi nang xa hoi. hieu va cam xuc va ((hanh vi) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) doi nang xa hoi. hieu va cam xuc va ((hanh vi) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) doi nang xa hoi. hieu va cam xuc va ((hanh vi) or (hanh va)) cuu tre*.