Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chat thuc » thuat thuc, nhan thuc, chat thai
thu sach » tu sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
vat vanh » vat thanh, vat va, van van
vanh dai » van dai, vanh tai, lanh dao
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thuat sach)) y nang xa hoi. hieu van chat thuc vat vanh dai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang xa hoi. hieu van chat thuc vat vanh dai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) y nang xa hoi. hieu van chat thuc vat vanh dai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) y nang xa hoi. hieu van chat thuc vat vanh dai ((cua tre) OR (cua te))*.