Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu vien » hieu hien, hieu viec, hieu tieng
van dinh » van minh, van dich, va dinh
sach ky » sac ky, sach ty, sach kem
dinh vi » dinh ve, dinh viet, dinh tri
nang xa » nang x, lang xa, nang ma
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van
vi cua » vai cua, di cua
cua te » cua tu

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 ky) or (sach y)) nang xa hoi. ((hieu vien) OR (thieu nien)) cac lo van dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang xa hoi. ((hieu vien) OR (thieu nien)) cac lo van dinh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) nang xa hoi. ((hieu vien) OR (thieu nien)) cac lo van dinh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang xa hoi. ((hieu vien) OR (thieu nien)) cac lo van dinh vi cua te*.