Perhaps you should try some spelling variations:
nhanh tri » nhanh thi, thanh tri, nhanh thai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ro » nang co, nang ho, nang ra
hieu ve » hieu van
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
ro hai » co hai, o hai, so hai

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 ro hai. ((hieu ve) or (hieu va)) cac ((luc van) or (duc va)) nhanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ro hai. ((hieu ve) OR (hieu va)) cac ((luc van) OR (duc va)) nhanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ro hai. ((hieu ve) or (hieu va)) cac ((luc van) or (duc va)) nhanh tri cua tre*.