Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sang lai » sang tai, sang lap, mang lai
tu sang » thu sang, tu san, tu quang
su phap » su pham, su phat, cu phap
vai cua » dai cua, hai cua, lai cua
va hanh » va thanh, va danh, ban hanh
phap xu » phap tu, phap thu, phap ngu
hieu su » hieu sau, tieu su, hieu so
lai hoa » dai hoa, loai hoc
ky sang » ky nang, ky dang, ky tang
tu lang » cu lang, tu lanh, xu lang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sang) OR (tu lang)) ky sang lai hoa. hieu su phap xu ((va hanh) or (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sang) OR (tu lang)) ky sang lai hoa. hieu su phap xu ((va hanh) OR (van hanh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sang) OR (tu lang)) ky sang lai hoa. hieu su phap xu ((va hanh) or (van hanh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sang) OR (tu lang)) ky sang lai hoa. hieu su phap xu ((va hanh) or (van hanh)) vai cua te*.