Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
cac xuc » cam xuc, chat xuc, cac cuoc
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua
de cua » le cua, te cua, dieu cua

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