Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
hang xa » hoang xa, hang va, hang ca
hieu va » hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
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: tu ((sach y) or (sach tu)) hang xa hoi. ((lieu va) or (hieu va)) cam luc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach tu)) hang xa hoi. ((lieu va) OR (hieu va)) cam luc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach tu)) hang xa hoi. ((lieu va) or (hieu va)) cam luc van hanh vi cuu tre*.