Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
danh hai » dang hai, lanh hai, manh hai
so sanh » do sanh
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van cau » van hau, van chat, toan cau
van dau » van dao, phan dau
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (vu khach)) ky nang ma hoi. thien ((van cau) OR (van dau)) truc va danh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (vu khach)) ky nang ma hoi. thien ((van cau) OR (van dau)) truc va danh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (vu khach)) ky nang ma hoi. thien ((van cau) OR (van dau)) truc va danh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (vu khach)) ky nang ma hoi. thien ((van cau) OR (van dau)) truc va danh hai cua tre*.