Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cuu thuc » cuu tac
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cuu » van cau, van chu, van cu
hanh te » hanh tu, hanh de, hanh he
hanh ve » hanh vi, hanh va, hanh kem
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang

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 van cuu thuc vat ((hanh te) or (hanh ve)) cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van cuu thuc vat ((hanh te) OR (hanh ve)) cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van cuu thuc vat ((hanh te) or (hanh ve)) cua tuc*.