Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat duc » chat xuc, chat doc, chet duoc
tan hanh » tan thanh, tang hanh, toan hanh
hanh mai » hanh ma, hanh mau, hanh may
va triet » va thiet, va trien, ve triet
sach tu » sach thu, cach tu, sach ty
nang xa » nang x, lang xa, nang ma

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 tu) or (sach thue)) nang xa hoi. hieu van chat duc tan hanh mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thue)) nang xa hoi. hieu van chat duc tan hanh mai va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach thue)) nang xa hoi. hieu van chat duc tan hanh mai va triet*.