Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
ly hoang » ly hang, ly hong, ly hoan
danh vai » danh sai, danh va, doanh van
le hoang » le hong, le quang, le tang
thuc dan » thuc hanh, hoc dan, thuc vat
vai cua » dai cua, hai cua, lai cua
ve cham » va cham, ve chat, vu cham
thuc va » thuc vat, thuc day
hieu ve » hieu va, hieu van
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ((ly hoang) OR (le hoang)) xa hoi. hieu ve cham ((thuc va) or (thuc dan)) danh vai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ((ly hoang) OR (le hoang)) xa hoi. hieu ve cham ((thuc va) OR (thuc dan)) danh vai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ((ly hoang) OR (le hoang)) xa hoi. hieu ve cham ((thuc va) or (thuc dan)) danh vai cua su".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((ly hoang) OR (le hoang)) xa hoi. hieu ve cham ((thuc va) or (thuc dan)) danh vai cua su*.