Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
van nhanh » van thanh, van hanh, van khanh
cua triet » cua viet, su triet, va triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, dua tren
su sai » su tai, su hai, su dai
sai ky » sac ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky tang xa hoi. hieu ve cac duc van nhanh hai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky tang xa hoi. hieu ve cac duc van nhanh hai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sai ky tang xa hoi. hieu ve cac duc van nhanh hai ((cua tre) or (cua triet))*.