Perhaps you should try some spelling variations:
mao triet » tao thiet, va triet, bo triet
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
so triet » su triet, so thiet, bo triet
xanh lam » hanh lam, dinh lam, xanh a
va xanh » va danh, va hanh, va anh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, tuc xa
ve cai » va cai, ve tai, ve cau
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

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 tham nang ma hoi. hieu ((ve cai) or (ve cac)) tuc va xanh lam ((so triet) or (mao triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tham nang ma hoi. hieu ((ve cai) OR (ve cac)) tuc va xanh lam ((so triet) OR (mao triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach tham nang ma hoi. hieu ((ve cai) or (ve cac)) tuc va xanh lam ((so triet) or (mao triet))*.