Perhaps you should try some spelling variations:
tham xang » tham lang, nham nang, pham hang
sach tham » sach nha
so sach » so sanh, bo sach, co sach
va danh » va dinh, va dan, va hanh
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
doi cua » dai cua, hoi cua
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
di cua » dai cua, de cua, do 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 tham xang xa hoi. hieu ve ((cac tuc) OR (cac toc)) va danh ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tham xang xa hoi. hieu ve ((cac tuc) OR (cac toc)) va danh ((di cua) OR (doi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tham xang xa hoi. hieu ve ((cac tuc) OR (cac toc)) va danh ((di cua) or (doi cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach tham xang xa hoi. hieu ve ((cac tuc) OR (cac toc)) va danh ((di cua) or (doi cua)) te*.