Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
sang mai » sang ma, sang tai, lang mai
danh lai » danh sai, gianh lai, dinh lam
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
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 sang mai hoi. ((hieu ve) OR (hieu van)) ((nam duoc) or (cam xuc)) va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky sang mai hoi. ((hieu ve) OR (hieu van)) ((nam duoc) OR (cam xuc)) va danh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky sang mai hoi. ((hieu ve) OR (hieu van)) ((nam duoc) or (cam xuc)) va danh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky sang mai hoi. ((hieu ve) OR (hieu van)) ((nam duoc) or (cam xuc)) va danh lai cua tre*.