Perhaps you should try some spelling variations:
su triet » su tien, ve triet
su viet » so viet
han tai » hang tai, nhan tai, van tai
nang xa » nang x, lang xa, nang ma
va cao » va cac, va co, va dao
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh
va cam » va cham, va cac, va cai
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 nang xa hoi. hieu ((va cam) OR (va cao)) tuc va han tai ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ((va cam) OR (va cao)) tuc va han tai ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ((va cam) OR (va cao)) tuc va han tai ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ((va cam) OR (va cao)) tuc va han tai ((su triet) or (su viet))*.