Perhaps you should try some spelling variations:
thieu nien » thien nhien
minh vai » minh va, minh hai, minh ai
nien dai » nhien dai, hien dai, vien dai
vai cuu » vai cua
luc van » luoc van, luu van, duc van
dai luc » dai luoc, dai luan, dai thuc
cuu tre » cua tre, cau tren, cau treo
sach ly » sach y, sach ty, sach hay
dai hoi » dai hai, dai moi
sach lo » sach dao, sach doi, sach hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ly) or (sach lo)) nang ((dai hoi) OR (dai hoc)). thieu nien dai luc van minh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ly) OR (sach lo)) nang ((dai hoi) OR (dai hoc)). thieu nien dai luc van minh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ly) or (sach lo)) nang ((dai hoi) OR (dai hoc)). thieu nien dai luc van minh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) or (sach lo)) nang ((dai hoi) OR (dai hoc)). thieu nien dai luc van minh vai cuu tre*.