Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
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: ((thuoc sach) or (hoc sach)) ((ty hang) OR (ly hang)) xa hoi. hieu va cac duc va thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ((ty hang) OR (ly hang)) xa hoi. hieu va cac duc va thanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (hoc sach)) ((ty hang) OR (ly hang)) xa hoi. hieu va cac duc va thanh vai cua te*".