Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
danh van » doanh van, dang van, anh van
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cau tre » cau treo, cau tra, cuu tre
cuu va » cuu van, cuu ve

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. hieu ve cham cuu va ((danh van) OR (dinh van)) ((cau tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. hieu ve cham cuu va ((danh van) or (dinh van)) ((cau tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. hieu ve cham cuu va ((danh van) or (dinh van)) ((cau tre) OR (cau tren))*.