Perhaps you should try some spelling variations:
thanh tap » thanh lap, thanh tai, thanh tay
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
ky sang » ky dang, ky tang, duy sang
hieu va » hieu qua
cam luc » cam xuc, cau luc
tap cua » tap quan, tiep cua
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc 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 ((ky sang) OR (ky nang)) xa hoi. ((lieu va) or (hieu va)) cam luc va thanh tap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky nang)) xa hoi. ((lieu va) OR (hieu va)) cam luc va thanh tap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) OR (ky nang)) xa hoi. ((lieu va) or (hieu va)) cam luc va thanh tap cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) OR (ky nang)) xa hoi. ((lieu va) or (hieu va)) cam luc va thanh tap cua tre*.