Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » hieu va, thien van, lieu va
lai cuu » lai cua, lai chau, lai cuoc
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sai ky)) tang ma hoi. hieu van cham ((xuc va) OR (tuc va)) hanh lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) tang ma hoi. hieu van cham ((xuc va) OR (tuc va)) hanh lai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) tang ma hoi. hieu van cham ((xuc va) OR (tuc va)) hanh lai cuu tre*".