Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
van chat » cao chat
hanh tai » thanh tai, hang tai, han tai
duc van » duc va, duc tan, duc manh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve chat » va chat
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
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 ky nang ma hoi. hieu ((ve chat) OR (van chat)) duc van ((thanh loi) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. hieu ((ve chat) OR (van chat)) duc van ((thanh loi) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. hieu ((ve chat) OR (van chat)) duc van ((thanh loi) or (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu ((ve chat) OR (van chat)) duc van ((thanh loi) or (hanh tai)) cua tre*.