Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
sang tao » hang tai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tao hai » tao dai, tao tai, tai hai
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (cac ky)) sang tao hai. hieu ve ((cham tuc) OR (pham thuc)) va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (cac ky)) sang tao hai. hieu ve ((cham tuc) OR (pham thuc)) va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (cac ky)) sang tao hai. hieu ve ((cham tuc) OR (pham thuc)) va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (cac ky)) sang tao hai. hieu ve ((cham tuc) OR (pham thuc)) va danh vi cua te*.