Perhaps you should try some spelling variations:
thien van » thi van
nam thuc » nam thuoc, nam thu
hanh vit » hanh vi, danh viet, hanh tiet
va hanh » van hanh, va thanh, va danh
ca tren » cau tren, cu tren, la tren
tu van » tu va
nam tu » nam thu
vit ca » viet ca, viet cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky nang x hoi. thien van ((nam tu) or (((nam thuc) OR (am thuc)))) va hanh vit ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang x hoi. thien van ((nam tu) OR (((nam thuc) OR (am thuc)))) va hanh vit ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky nang x hoi. thien van ((nam tu) or (((nam thuc) OR (am thuc)))) va hanh vit ca tren".
• Adding a wildcard symbol may retrieve word variants: tu van ky nang x hoi. thien van ((nam tu) or (((nam thuc) OR (am thuc)))) va hanh vit ca tren*.