Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
chon loc » cho hoc
cham loc » cham soc, cham o, hau loc
tu sach » su sach, te sach, tu cach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di 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 (thu sach)) _ sang ma hoi. lieu va ((cham loc) or (chon loc)) va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) _ sang ma hoi. lieu va ((cham loc) OR (chon loc)) va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) _ sang ma hoi. lieu va ((cham loc) or (chon loc)) va hanh vi cua tre*.