Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
va tuan » van tuan, va quan, va toan
va hanh » va thanh, va danh, ban hanh
luy tre » luyen tre
te cac » tu cac, ve cac, te cao
vi luy » vi lua, vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ((ky lang) or (ky nang)) xa hoi. hieu va tuan le ((va hanh) or (van hanh)) vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky lang) OR (ky nang)) xa hoi. hieu va tuan le ((va hanh) OR (van hanh)) vi luy tre.
• Adding a wildcard symbol may retrieve word variants: te cac ((ky lang) or (ky nang)) xa hoi. hieu va tuan le ((va hanh) or (van hanh)) vi luy tre*.