Perhaps you should try some spelling variations:
sach tham » sach nha
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
tham ang » tham lang, nham nang, pham hang
so sach » so sanh, bo sach, co sach
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
da tuc » dao tuc, va tuc, da 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.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tham ang xa hoi. ((hieu vien) OR (hieu hien)) da tuc va danh ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tham ang xa hoi. ((hieu vien) OR (hieu hien)) da tuc va danh ((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 (hieu hien)) da tuc va danh ((di cua) or (doi cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach tham ang xa hoi. ((hieu vien) OR (hieu hien)) da tuc va danh ((di cua) or (doi cua)) te*.