Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh moi » thanh loi, thanh hoa, thanh hai
thanh do » thanh de, thanh pho, thanh hoa
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
le lang » le tang, le dang, le xang
lo lang » o lang, so lang, hoa lang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((lo lang) OR (le lang)) xa hoi. hieu va cac duc va ((thanh moi) or (thanh do)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((lo lang) OR (le lang)) xa hoi. hieu va cac duc va ((thanh moi) OR (thanh do)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((lo lang) OR (le lang)) xa hoi. hieu va cac duc va ((thanh moi) or (thanh do)) cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((lo lang) OR (le lang)) xa hoi. hieu va cac duc va ((thanh moi) or (thanh do)) cua te*.