Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac tai
cac dac » cac dan, cac dai, cac bac
van vat » van chat, nhan vat
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: tu sach y nang xa hoi. hieu va ((cac tac) or (cac dac)) va van vat ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va ((cac tac) OR (cac dac)) va van vat ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va ((cac tac) or (cac dac)) va van vat ((cua tre) or (cua te))*.