Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nham nang » phap nang, cam nang, kha nang
toc sach » hoc sach, doc sach, nuoc sach
va huong » va thuong, va phuong, va tuong
doi cua » dai cua, hoi cua
doi cuu » doi cuoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (thuoc sach)) nham nang xa hoi. hieu va cac tu va huong ((doi cuu) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) nham nang xa hoi. hieu va cac tu va huong ((doi cuu) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) nham nang xa hoi. hieu va cac tu va huong ((doi cuu) or (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) nham nang xa hoi. hieu va cac tu va huong ((doi cuu) or (doi cua)) tre*.