Perhaps you should try some spelling variations:
chat tre » chay tren, chat tai, cho tre
hanh lam » thanh lap, hanh kem, dinh lam
cham duc » pham duc, cham soc, pham duy
hanh va » hang va, hanh vi
su sach » so sach
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
ty mang » ty xang, ty hang, tin mang
vu sach » vu bach, vu khach
va cham » va chat, va tham

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ty mang may hoi. hieu va cham duc va ((hanh lam) OR (hanh va)) chat tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty mang may hoi. hieu va cham duc va ((hanh lam) OR (hanh va)) chat tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty mang may hoi. hieu va cham duc va ((hanh lam) OR (hanh va)) chat tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty mang may hoi. hieu va cham duc va ((hanh lam) OR (hanh va)) chat tre*.