Perhaps you should try some spelling variations:
luoc dai » cuoc doi, hoc dai, duc dai
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. hieu ve cac ((duc van) or (luoc dai)) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve cac ((duc van) OR (luoc dai)) hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve cac ((duc van) or (luoc dai)) hanh vi cua viet*.