Perhaps you should try some spelling variations:
thien van » thi van
nam thuc » nam thuoc, am thuc, nam thu
hanh vit » hanh vi, danh viet, hanh tiet
ca tren » cau tren, cu tren, la tren
va hanh » van hanh, va thanh, va danh
vit ca » viet ca, viet cau
tu san » thu san, tu ban, vu san
tu can » tu ban, tu cac, thu canh
nam tu » nam thu
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 san) OR (tu can)) ky nang x hoi. thien van ((nam tu) or (nam thuc)) va hanh vit ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu can)) ky nang x hoi. thien van ((nam tu) OR (nam thuc)) va hanh vit ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (tu can)) ky nang x hoi. thien van ((nam tu) or (nam thuc)) va hanh vit ca tren".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (tu can)) ky nang x hoi. thien van ((nam tu) or (nam thuc)) va hanh vit ca tren*.