Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
co sach » cuon sach, hoc sach
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
cuc tre » duc tre, cua tre, cuu tre
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
bo sach » hoc sach
tuc va » thuc va, tuc xa, duc va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) OR (bo sach)) ly hang xa hoi. hieu ve cac ((tuc va) or (truc va)) hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (bo sach)) ly hang xa hoi. hieu ve cac ((tuc va) OR (truc va)) hanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) OR (bo sach)) ly hang xa hoi. hieu ve cac ((tuc va) or (truc va)) hanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((co sach) OR (bo sach)) ly hang xa hoi. hieu ve cac ((tuc va) or (truc va)) hanh tai cuc tre*.