Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
sach thu » sach thue, sach thieu, sach tham
van bao » van ban, van dao
va hanh » van hanh, va thanh, va danh
van bac » van ban, van hac, dan bac
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
cuc tre » duc tre, cua tre, cuu tre
xuc va » duc va, tuc va, luc va

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 ty) OR (sach thu)) nang xa hoi. hieu ((van bac) or (van bao)) xuc va hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sach thu)) nang xa hoi. hieu ((van bac) OR (van bao)) xuc va hanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach thu)) nang xa hoi. hieu ((van bac) or (van bao)) xuc va hanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) OR (sach thu)) nang xa hoi. hieu ((van bac) or (van bao)) xuc va hanh tai cuc tre*.