Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kham tuc » nham thuc, pham thuc, kham cuoc
cua tre » cua te, cuu tre, dua tren
vu kham » vu khanh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
tuc va » thuc va, truc va, tuc xa
va dat » va dao, va dau, va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang ma) or (tang ma)) hoi. hieu vu kham tuc va dat cau ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (tang ma)) hoi. hieu vu kham tuc va dat cau ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) or (tang ma)) hoi. hieu vu kham tuc va dat cau ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (tang ma)) hoi. hieu vu kham tuc va dat cau ((cua tre) OR (cua triet))*.