Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
hanh dai » hanh dao, vanh dai, thanh dat
sach ly » sach y, sach lo, sach ty
cua tre » cuu tre, cua triet, dua tren
tu sach » thu sach, su sach, te sach
dac ban » cac ban, dac san, duc ban
cau dac » cuu dac, cac dac, cau danh
van cau » van dau, van hau, van chat
ly nang » ky nang, ly hang, ly vang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu van cau dac ban ((hanh dai) OR (hanh tai)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang x hoi. hieu van cau dac ban ((hanh dai) OR (hanh tai)) ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang x hoi. hieu van cau dac ban ((hanh dai) OR (hanh tai)) ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x hoi. hieu van cau dac ban ((hanh dai) OR (hanh tai)) ((cua tre) or (cua te))*.