Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
dinh vai » dinh van, dinh vi, dinh va
lanh ky » hanh ky, nganh ky, thanh ky
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu van
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
luc 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: thuat lanh ky dang xa hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) dinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ky dang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (duc va)) dinh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh ky dang xa hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) dinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat lanh ky dang xa hoi. ((hieu ve) or (hieu va)) cam ((luc va) OR (duc va)) dinh vai cua tre*.