Perhaps you should try some spelling variations:
ve triet » va trien, su triet
ban hanh » ban hang
sach tu » sach thu, cach tu, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, dao hanh
tu sach » thu sach, su sach, te sach
hac xuc » chat xuc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
va hac » van hac, va khac, va cac
lai ve » loai ve, lai va, la ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang xa hoi. hieu va hac xuc ((((va hanh) OR (ban hanh))) or (va danh)) lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. hieu va hac xuc ((((va hanh) OR (ban hanh))) OR (va danh)) lai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang xa hoi. hieu va hac xuc ((((va hanh) OR (ban hanh))) or (va danh)) lai ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. hieu va hac xuc ((((va hanh) OR (ban hanh))) or (va danh)) lai ve triet*.