Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
thuc dan » thuc hanh, hoc dan
te sach » toc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (so sanh)) ky lang xa hoi. hieu van nam ((thuc dan) or (thuc vat)) thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sanh)) ky lang xa hoi. hieu van nam ((thuc dan) OR (thuc vat)) thanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sanh)) ky lang xa hoi. hieu van nam ((thuc dan) or (thuc vat)) thanh vi cuu tre*.