Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
hieu va » hieu qua
sach ty » sach y, sach thu, xach tay
cuu tre » cua tre, cau tren, cau treo
hang xa » hoang xa, hang va, hang ca
sach tu » sach thu, cach tu, sach uu
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 ty) 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 ty) OR (sach tu)) hang xa hoi. ((lieu va) OR (hieu va)) cam luc van hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) 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 ty) OR (sach tu)) hang xa hoi. ((lieu va) or (hieu va)) cam luc van hanh vi cuu tre*.