Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
hanh vai » hanh vi, hanh va, hanh tai
mang lai » mang lam, mang luoi, dang loai
hieu su » hieu sau, tieu su, hieu so
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
can duc » van duc, cao duc, tran duc
tu bac » tu ban, tu bat, tu bai
su can » su van, su cao, tu can
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 bac) or (tu cac)) ky ((sang lap) or (mang lai)) hoi. hieu su can duc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu cac)) ky ((sang lap) OR (mang lai)) hoi. hieu su can duc va hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu cac)) ky ((sang lap) or (mang lai)) hoi. hieu su can duc va hanh vai cua te*.