Perhaps you should try some spelling variations:
danh lai » danh sai, gianh lai, dinh lam
sang tai » hang tai, sang tao, tang tai
tai khoi » tai khoa, mai khoi, tao khoi
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren, cau treo
cam duc » cao duc, pham duc, nam duoc
cua tre » cua te, cua triet, dua tren
ky sang » ky nang, ky dang, ky tang
va danh » va dinh, va dan, va hanh
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky sang tai khoi. hieu van ((cam duc) or (cam xuc)) va danh lai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky sang tai khoi. hieu van ((cam duc) OR (cam xuc)) va danh lai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky sang tai khoi. hieu van ((cam duc) or (cam xuc)) va danh lai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te cac ky sang tai khoi. hieu van ((cam duc) or (cam xuc)) va danh lai ((cua tre) OR (cuu tre))*.