Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
nang ma » tang ma, sang ma, mang may
lanh y » anh y, hanh y, lanh lay

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 y ((nang ma) or (nang cao)) hoi. ((hieu ve) OR (hieu va)) cao duc van anh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh y ((nang ma) OR (nang cao)) hoi. ((hieu ve) OR (hieu va)) cao duc van anh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh y ((nang ma) or (nang cao)) hoi. ((hieu ve) OR (hieu va)) cao duc van anh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat lanh y ((nang ma) or (nang cao)) hoi. ((hieu ve) OR (hieu va)) cao duc van anh vai cua tre*.