Perhaps you should try some spelling variations:
sach thu » sach thue, sach tham, cach thuc
pham day » phap day, pham duy, pham xay
danh van » doanh van, dang van, dinh van
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va danh » va dinh, va dan, va hanh
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) or (sach thieu)) nang xa hoi. hieu ve pham day va danh van cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thieu)) nang xa hoi. hieu ve pham day va danh van cau treo.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thieu)) nang xa hoi. hieu ve pham day va danh van cau treo*.