Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
va trien » va truyen, va thiet, va tuyen
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) lang xa hoi. hieu van nam ((thuc va) OR (thuc day)) hang va va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu van nam ((thuc va) OR (thuc day)) hang va va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) lang xa hoi. hieu van nam ((thuc va) OR (thuc day)) hang va va trien".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. hieu van nam ((thuc va) OR (thuc day)) hang va va trien*.