Perhaps you should try some spelling variations:
sach tham » sach nha
tham lang » nham nang, pham hang, thai bang
te sach » toc sach
va xanh » va hanh, va anh, va banh
va danh » va dinh, va dan, va hanh
cac thu » cach thuc, cac thoi
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
di cuu » di cau, dinh cuu
di cua » dai cua, doi cua, de cua

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 tham lang xa hoi. hieu va cac thu ((va xanh) or (va danh)) ((di cuu) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tham lang xa hoi. hieu va cac thu ((va xanh) OR (va danh)) ((di cuu) OR (di cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham lang xa hoi. hieu va cac thu ((va xanh) or (va danh)) ((di cuu) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach tham lang xa hoi. hieu va cac thu ((va xanh) or (va danh)) ((di cuu) OR (di cua)) tre*.