Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
van vat » van chat, nhan vat
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
tac va » tac da, tac xa, tuc 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 ((y nang) OR (ly nang)) xa hoi. hieu va cac tac va van vat cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) xa hoi. hieu va cac tac va van vat cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (ly nang)) xa hoi. hieu va cac tac va van vat cua tre*.