Perhaps you should try some spelling variations:
cach thuc » anh thuc
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
dua tren » dung tren
so sach » so sanh, bo sach, co 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 va » lieu va, hieu qua
cac thu » cac thoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly nang xa hoi. hieu va ((cach thuc) or (cac thu)) gia thanh vi ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly nang xa hoi. hieu va ((cach thuc) OR (cac thu)) gia thanh vi ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: so sach ly nang xa hoi. hieu va ((cach thuc) or (cac thu)) gia thanh vi ((dua tren) or (cua triet))*.