Perhaps you should try some spelling variations:
cham loc » chon loc, cham o, hau loc
tu sach » thu sach, su sach, tu cach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 7 tang
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) or (te sach)) y tang ma hoi. hieu va ((cham loc) OR (cham soc)) va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y tang ma hoi. hieu va ((cham loc) OR (cham soc)) va hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y tang ma hoi. hieu va ((cham loc) OR (cham soc)) va hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y tang ma hoi. hieu va ((cham loc) OR (cham soc)) va hanh va cua tre*.