Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
cua viet » ca viet, hoa viet, cua vat
thi hang » thi hanh, thi nang, thi hong
thai cua » than cua, tai cuc, tri cua
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ki nang » ky nang
ca hoi » cau hoi, cua hoi, xa hoi
thu va » thue va, tu va, thu ha
va cam » va cham, va cac, va cao

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 ((thi hang) or (ki nang)) ca hoi. hieu va cam ((thu va) or (thuc va)) hanh thai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thi hang) OR (ki nang)) ca hoi. hieu va cam ((thu va) OR (thuc va)) hanh thai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((thi hang) or (ki nang)) ca hoi. hieu va cam ((thu va) or (thuc va)) hanh thai cua viet*.