Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
thai cuu » thai cua, thi cuc, thai xu
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. thien van bac xuc ((van hanh) or (ban hanh)) ((thai cuu) OR (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. thien van bac xuc ((van hanh) OR (ban hanh)) ((thai cuu) OR (tai cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. thien van bac xuc ((van hanh) or (ban hanh)) ((thai cuu) OR (tai cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. thien van bac xuc ((van hanh) or (ban hanh)) ((thai cuu) OR (tai cuc)) tre*.