Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
lang lai » lang dai, lang hai, lang mai
hanh vai » hanh vi, hanh tai, hanh van
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
ky lang » ky nang, ky dang, ky tang
tuc va » thuc va, tuc xa, duc va

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 ky lang lai hoi. hieu ve cham ((tuc va) OR (truc va)) ((hanh vai) or (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang lai hoi. hieu ve cham ((tuc va) OR (truc va)) ((hanh vai) OR (hanh va)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang lai hoi. hieu ve cham ((tuc va) OR (truc va)) ((hanh vai) or (hanh va)) cau tren*".