Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
tang tai » hang tai, sang tao, dong tai
hanh lam » thanh lap, hanh kem, dinh lam
vu sach » vu bach, su sach, vu khach
hanh va » hang va, hanh vi
va cham » va chat, va tham
sach tu » sach thu, cach tu, sach ty
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 tu ((tang tai) or (dung tai)) khoi. lieu va cham duc va ((hanh lam) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu ((tang tai) OR (dung tai)) khoi. lieu va cham duc va ((hanh lam) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu ((tang tai) or (dung tai)) khoi. lieu va cham duc va ((hanh lam) OR (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach tu ((tang tai) or (dung tai)) khoi. lieu va cham duc va ((hanh lam) OR (hanh va)) cua tre*.