Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thu hang, thu bang, tho nang
phat tai » pham tai, phap tai, chat tai
thi nang » thi cong, ki nang, thi hanh
tai cua » thai cua, tai cuc, tri cua
va chat » van chat, cao chat, hoa chat
va cham » va tham
cuu va » cuu van, cuu ve
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ((thu nang) or (thi nang)) x hoi. hieu ((va cham) or (va chat)) cuu va phat tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((thu nang) OR (thi nang)) x hoi. hieu ((va cham) OR (va chat)) cuu va phat tai cua tu.
• Adding a wildcard symbol may retrieve word variants: toc sach ((thu nang) or (thi nang)) x hoi. hieu ((va cham) or (va chat)) cuu va phat tai cua tu*.