Perhaps you should try some spelling variations:
nang doc » nang luc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
doc hoi » duoc hoi, hoc hoi, doc hai
ty nang » ky nang, ty xang, ty hang
loc va » hoc va
luc va » duc va, tuc va
vi cua » vai cua, di cua

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 ty nang doc hoi. hieu ((va cham) or (va cac)) ((loc va) OR (luc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang doc hoi. hieu ((va cham) OR (va cac)) ((loc va) OR (luc va)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang doc hoi. hieu ((va cham) or (va cac)) ((loc va) OR (luc va)) hanh vi cua tre*".