Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va
xac va » tac va, ac va, bac va
luc va » duc va, tuc va, loc 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 xa hoi. hieu va cam ((((xuc va) OR (xac va))) or (luc va)) hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu va cam ((((xuc va) OR (xac va))) OR (luc va)) hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. hieu va cam ((((xuc va) OR (xac va))) or (luc va)) hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu va cam ((((xuc va) OR (xac va))) or (luc va)) hanh tri cua tre*.