Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tang ma » mang may, tang van
tu tang » tuc tang, tu trang, tu tong
soc va » hoc va, loc va, doc va
ma hoi » mai hoi, xa hoi, ma hoa

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 tu tang ma hoi. hieu van cham soc va ((hanh lai) or (hanh lam)) ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu tang ma hoi. hieu van cham soc va ((hanh lai) OR (hanh lam)) ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu tang ma hoi. hieu van cham soc va ((hanh lai) or (hanh lam)) ((cua tre) or (cau treo))*.