Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh lam » thanh lap, hanh kem, hanh va
sach ty » sach y, sach tu, sach thu
bo sach » co sach, hoc sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
lam ve » la ve, lam vu, nam ve
tu xa » tu va, te xa, tu ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ty ((nang ma) OR (sang ma)) hoi. hieu ve cac ((tu xa) or (tu xay)) hanh lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty ((nang ma) OR (sang ma)) hoi. hieu ve cac ((tu xa) OR (tu xay)) hanh lam ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ty ((nang ma) OR (sang ma)) hoi. hieu ve cac ((tu xa) or (tu xay)) hanh lam ve triet*".