Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
buu tre » cuu tre
va hanh » va thanh, va danh, ban hanh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cao
te ban » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ban ((ky lang) OR (ky dang)) ha hoi. hieu va cam luc ((va hanh) or (van hanh)) tai buu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ((ky lang) OR (ky dang)) ha hoi. hieu va cam luc ((va hanh) OR (van hanh)) tai buu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ban ((ky lang) OR (ky dang)) ha hoi. hieu va cam luc ((va hanh) or (van hanh)) tai buu tre".
• Adding a wildcard symbol may retrieve word variants: te ban ((ky lang) OR (ky dang)) ha hoi. hieu va cam luc ((va hanh) or (van hanh)) tai buu tre*.