Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
va triet » va thiet, va trien, ve triet
hanh de » hanh ve, hanh kem
danh di » danh du, xanh di, danh dien
duc van » duc va, duc tan, duc manh
tai hoi » tai khoi, dai hoi, tai hai
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang tai hoi. hieu van pham duc van ((danh di) or (hanh de)) ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang tai hoi. hieu van pham duc van ((danh di) OR (hanh de)) ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang tai hoi. hieu van pham duc van ((danh di) or (hanh de)) ((va triet) or (su triet))*.