Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
duc manh » suc manh, duc anh, duc minh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ve cac » va cac, vien cac

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)) ky lang xa hoi. hieu ve cac duc manh ((hanh tai) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu ve cac duc manh ((hanh tai) OR (hanh vi)) cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang xa hoi. hieu ve cac duc manh ((hanh tai) or (hanh vi)) cua viet*.