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