Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
hoc kinh » hoc sinh, luoc kinh
danh vit » dinh viet, dang viet, danh vinh
truc va » thuc va, thuc vat, trung va
ca tren » cau tren, cu tren, la tren
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ve cau » ke cau, va cau, ve cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kinh ((ky lang) or (ky dang)) van hoi. hieu ve cau truc va ((danh vit) OR (danh viet)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh ((ky lang) OR (ky dang)) van hoi. hieu ve cau truc va ((danh vit) OR (danh viet)) ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kinh ((ky lang) or (ky dang)) van hoi. hieu ve cau truc va ((danh vit) OR (danh viet)) ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc kinh ((ky lang) or (ky dang)) van hoi. hieu ve cau truc va ((danh vit) OR (danh viet)) ca tren*.