Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
doanh van » doan van, doanh va, doanh ban
hoc sach » hoc sinh, hoc anh
danh vai » danh sai, danh va, dang van
thuc va » thuc vat, thuc dan, thuc day
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
hoc cac » hoc cao
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: ((hoc sach) or (hoc cac)) ly hang xa hoi. hieu va chat thuc va ((danh vai) OR (doanh van)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ly hang xa hoi. hieu va chat thuc va ((danh vai) OR (doanh van)) cua su*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc cac)) ly hang xa hoi. hieu va chat thuc va ((danh vai) OR (doanh van)) cua su*".