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
hieu ve » hieu va, hieu van
thuc va » thuc dan, thuc day
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam

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 ve nam ((thuc va) OR (thuc vat)) 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 ve nam ((thuc va) OR (thuc vat)) 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 ve nam ((thuc va) OR (thuc vat)) han tai ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve nam ((thuc va) OR (thuc vat)) han tai ((su triet) or (su viet))*.