Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
cham tuc » nham thuc, tham thuc, cham soc
thanh va » thanh van, thanh ha, thanh ve
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
mai hoi » mai khoi, dai hoi, lai hoi
tu cao » cu cao, tu cac, vu cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cao ky nang mai hoi. hieu van ((cham tuc) OR (pham thuc)) va ((thanh va) OR (hanh va)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky nang mai hoi. hieu van ((cham tuc) or (pham thuc)) va ((thanh va) OR (hanh va)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang mai hoi. hieu van ((cham tuc) or (pham thuc)) va ((thanh va) OR (hanh va)) cuu tre*.