Perhaps you should try some spelling variations:
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
luc van » luoc van, luu van, duc van
hanh ve » hanh vi, hanh va, hanh kem
hanh di » hanh vi, hanh de, hang di
nay luc » nay lua, nang luc, nhan luc
cua tre » cua te, cuu tre, cua triet
va nay » va ngay, va cay

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 cao) or (dang xay)) hoi. lieu va nay luc van ((hanh di) or (hanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang cao) OR (dang xay)) hoi. lieu va nay luc van ((hanh di) OR (hanh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang cao) or (dang xay)) hoi. lieu va nay luc van ((hanh di) or (hanh ve)) cua tre*.