Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
duc minh » duc anh
duc manh » suc manh, duc anh, duc tan
tang dai » tang tai, tang dan, lang dai
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
anh vai » anh va, anh bai, anh tai
anh van » anh va, thanh van, doanh van
cua tre » cua te, cuu tre, cua triet
ve dao » de dao, va dao, ve bao
lanh y » anh y, hanh y, lanh lay
y tang » ky tang, 6 tang, 7 tang

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