Perhaps you should try some spelling variations:
thien van » thi van
dang mai » dang hai, dang mau, dang bai
cham cuu » cap cuu, chat cua
hieu va » lieu va, hieu qua
kem cua » em cua, keo cua, diem cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
cuu va » cuu van, cuu ve
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang mai hoi. ((hieu ve) or (((thien van) or (hieu va)))) cham cuu va hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang mai hoi. ((hieu ve) OR (((thien van) OR (hieu va)))) cham cuu va hanh kem cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang mai hoi. ((hieu ve) or (((thien van) or (hieu va)))) cham cuu va hanh kem cua tre*.