Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
cuu tre » cua tre, cau tren, cau treo
tri cuu » tri cua, tra cuu, trinh cuu
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
loc va » hoc va, luc va
te sac » te cac, te san
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te sach)) ky lang xa hoi. hieu va cam ((tuc xa) or (loc va)) hanh tri cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang xa hoi. hieu va cam ((tuc xa) OR (loc va)) hanh tri cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky lang xa hoi. hieu va cam ((tuc xa) or (loc va)) hanh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky lang xa hoi. hieu va cam ((tuc xa) or (loc va)) hanh tri cuu tre*.