Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
phan duc » pham duc, phan tu, phan dau
va thanh » gia thanh, ban thanh, va tinh
nang xa » nang x, lang xa, nang ma
vai cua » hai cua, lai cua, bai cua
sach 2 » sach y
2 nang » v nang

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 2 nang xa hoi. hieu van phan duc va thanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach 2 nang xa hoi. hieu van phan duc va thanh ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: toc sach 2 nang xa hoi. hieu van phan duc va thanh ((vai cua) or (dai cua)) tre*.