Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
ca tren » cau tren, cu tren, la tren
y nang » ky nang, ly nang, v nang
ha luu » hat luu, ta luu, phap luu
van ha » van hoa, van chat, van phan

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 y nang xa hoi. hieu van ha luu ((van hanh) OR (van thanh)) de ((cua tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu van ha luu ((van hanh) OR (van thanh)) de ((cua tre) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu van ha luu ((van hanh) OR (van thanh)) de ((cua tre) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van ha luu ((van hanh) OR (van thanh)) de ((cua tre) or (ca tren))*.