Perhaps you should try some spelling variations:
thien van » thi van
lang mai » lang dai, lang hai, lang man
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 lang » ky nang, ky dang, ky tang
sai ky » sac ky
cuu va » cuu van, cuu ve
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky lang 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 sai ky lang 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 sai ky lang mai hoi. ((hieu ve) or (((thien van) or (hieu va)))) cham cuu va hanh kem cua tre*.