Perhaps you should try some spelling variations:
lang hoa » hang hoa, lang ha, nang hoa
cua viet » ca viet, cua vat, cua dieu
nang hai » hang hai, nang tai, dang hai
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
ky lang » ky nang, ky dang, ky tang
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu ve » hieu va, hieu van
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 lang hoa hoi. hieu ve nam ((thuc va) OR (thuc day)) nang hai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang hoa hoi. hieu ve nam ((thuc va) OR (thuc day)) nang hai ((cua viet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang hoa hoi. hieu ve nam ((thuc va) OR (thuc day)) nang hai ((cua viet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang hoa hoi. hieu ve nam ((thuc va) OR (thuc day)) nang hai ((cua viet) or (hoa viet))*.