Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua viet » ca viet, hoa viet, cua dieu
cham loc » cham soc, chon loc, cham o
hieu vu » hieu va, hieu ve, hieu su
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
ha nang » kha nang, hoa nang, da nang
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va

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 (thuoc sach)) ha nang ma hoi. hieu vu cham loc va hanh vi ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ha nang ma hoi. hieu vu cham loc va hanh vi ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ha nang ma hoi. hieu vu cham loc va hanh vi ((cua viet) or (cua vat))*.