Perhaps you should try some spelling variations:
dat duoc » dat nuoc, da duoc, luat duoc
va gianh » va gian, van giang, va thanh
sang mai » sang ma, sang tai, lang mai
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
sai ky » sac ky
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 sang mai hoi. hieu ve ((dat duoc) or (cam xuc)) ((va gianh) OR (va giai)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky sang mai hoi. hieu ve ((dat duoc) OR (cam xuc)) ((va gianh) OR (va giai)) lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky sang mai hoi. hieu ve ((dat duoc) or (cam xuc)) ((va gianh) OR (va giai)) lai cua tre*".