Perhaps you should try some spelling variations:
pham duy » pham duc
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
tang van » dang van, hoang van, trong van
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
lam cua » nam cua, lam chat
tang ma » mang may
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: su sach thu ((tang ma) or (tang van)) hoi. lieu va ((pham duy) or (cham soc)) van hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((tang ma) OR (tang van)) hoi. lieu va ((pham duy) OR (cham soc)) van hanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach thu ((tang ma) or (tang van)) hoi. lieu va ((pham duy) or (cham soc)) van hanh lam cua tre*.