Perhaps you should try some spelling variations:
cham loc » cham soc, chon loc, hau loc
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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 ty 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 ty 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 ty nang ma hoi. hieu ve ((cham loc) OR (cham o)) va hanh va cua tre*.