Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
tham nhung » thi nhung
nuoc sach » nguoi sach, hoc sach, cuoc cach
nhung xa » chung xa, nhung ba, nhung ca
cac luc » cau luc, cac nuoc, cac cuoc
hieu va » lieu va, hieu qua
va dan » ca dan, va dao, va dau
dan di » danh di, dan da, dan de
di cua » dai cua, doi cua, de cua
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (nuoc sach)) tham nhung xa hoi. hieu va ((cac luc) or (coc luc)) va dan di cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) tham nhung xa hoi. hieu va ((cac luc) OR (coc luc)) va dan di cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) tham nhung xa hoi. hieu va ((cac luc) or (coc luc)) va dan di cua cu".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (nuoc sach)) tham nhung xa hoi. hieu va ((cac luc) or (coc luc)) va dan di cua cu*.