Perhaps you should try some spelling variations:
cham loc » cham soc, chon loc, hau loc
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
xang ma » tang ma, sang ma, rang ma
cua tre » cua te, cuu tre, cua triet
cham o » cham soc
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((xang ma) OR (nang ma)) hoi. hieu ve ((cham loc) or (cham o)) va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((xang ma) OR (nang ma)) hoi. hieu ve ((cham loc) OR (cham o)) va hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((xang ma) OR (nang ma)) hoi. hieu ve ((cham loc) or (cham o)) va hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((xang ma) OR (nang ma)) hoi. hieu ve ((cham loc) or (cham o)) va hanh va cua tre*.