Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
dinh chi » dinh thi, dinh tri, dinh moi
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
cac tu » cac thu, cach tu, tac tu

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