Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, duc va
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang co hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh dai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang co hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh dai va trien.
• Adding a wildcard symbol may retrieve word variants: su sach y nang co hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh dai va trien*.