Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, phan duc
hanh lam » thanh lap, hanh kem, hanh va
pham duy » pham duc
lam cua » nam cua, lam chat
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
hieu vu » hieu va, hieu ve, hieu su
ty tang » tay tang, ty hang, ky tang
cua tre » cua te, cuu tre, cua triet

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 ((ty tang) OR (ty xang)) van hoa. hieu vu ((cham duc) or (pham duy)) va hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty tang) OR (ty xang)) van hoa. hieu vu ((cham duc) OR (pham duy)) va hanh lam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty tang) OR (ty xang)) van hoa. hieu vu ((cham duc) or (pham duy)) va hanh lam cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty tang) OR (ty xang)) van hoa. hieu vu ((cham duc) or (pham duy)) va hanh lam cua tre*.