Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
tuc van » thuc van, truc van, tuc va
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky tang ma hoi. hieu ((((ve cham) or (vu cham))) or (cao chat)) tuc van hanh tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky tang ma hoi. hieu ((((ve cham) OR (vu cham))) OR (cao chat)) tuc van hanh tri va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sai ky tang ma hoi. hieu ((((ve cham) or (vu cham))) or (cao chat)) tuc van hanh tri va thiet*.