Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
hanh lam » thanh lap, hanh va, dinh lam
vu sach » vu bach, su sach, vu khach
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, dua tren
sach 6 » sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach 6 tang ma hoi. hieu vu cham duc va ((hanh lam) or (hanh kem)) ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach 6 tang ma hoi. hieu vu cham duc va ((hanh lam) OR (hanh kem)) ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach 6 tang ma hoi. hieu vu cham duc va ((hanh lam) or (hanh kem)) ((cua tre) or (cua triet))*.