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

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 ((ky lang) OR (ky nang)) 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 ((ky lang) OR (ky nang)) 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 ((ky lang) OR (ky nang)) xa hoi. hieu va cam ((tuc xa) or (loc va)) hanh tri cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) OR (ky nang)) xa hoi. hieu va cam ((tuc xa) or (loc va)) hanh tri cuu tre*.