Perhaps you should try some spelling variations:
cham duc » cham soc, pham duy, phan duc
hanh lam » thanh lap, hanh kem, dinh lam
su sach » so sach, vu sach
ty tang » tay tang, ty xang, ty hang
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
cua te » cua tu
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: su sach ty tang ma hoi. hieu vu ((cham duc) OR (pham duc)) va ((hanh lam) or (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang ma hoi. hieu vu ((cham duc) OR (pham duc)) va ((hanh lam) OR (hanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty tang ma hoi. hieu vu ((cham duc) OR (pham duc)) va ((hanh lam) or (hanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty tang ma hoi. hieu vu ((cham duc) OR (pham duc)) va ((hanh lam) or (hanh va)) cua te*.