Perhaps you should try some spelling variations:
thieu nien » thien nhien
van hoang » van hoan, quan hoang, tran hoang
nien cac » vien cac, dien cac, bien cac
van hang » van khang, van thang, ban hang
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, cac nuoc, chat xuc
su viet » so viet
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. thieu nien cac xuc ((van hang) OR (van hoang)) tai ((su viet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. thieu nien cac xuc ((van hang) OR (van hoang)) tai ((su viet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. thieu nien cac xuc ((van hang) OR (van hoang)) tai ((su viet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. thieu nien cac xuc ((van hang) OR (van hoang)) tai ((su viet) or (va thiet))*.