Perhaps you should try some spelling variations:
thieu nien » thien nhien
sach tham » sach nha
hieu vien » hieu hien, hieu viec, hieu tieng
tham ang » tham lang, nham nang, pham hang
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
cac tuc » cac toc, cac tu, cac tac
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, de cua, do cua
ang xa » lang xa, mang xa, dang xay

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tham ang xa hoi. ((hieu vien) OR (thieu nien)) cac tuc va hanh ((di cua) OR (doi cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tham ang xa hoi. ((hieu vien) OR (thieu nien)) cac tuc va hanh ((di cua) or (doi cua)) te~".
• Adding a wildcard symbol may retrieve word variants: so sach tham ang xa hoi. ((hieu vien) OR (thieu nien)) cac tuc va hanh ((di cua) or (doi cua)) te*.