Perhaps you should try some spelling variations:
thien van » thi van
cau treo » cau theo, cau tren, cau triet
nam thuc » nam thuoc, am thuc, nam thu
dau tren » dau tien, dat tren, dau tieng
dang xa » dang xay, lang xa, dang ha
sach ky » sach y, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau

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 (sac ky)) dang xa hoi. thien van nam thuc va dan vai ((cau treo) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) dang xa hoi. thien van nam thuc va dan vai ((cau treo) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) dang xa hoi. thien van nam thuc va dan vai ((cau treo) or (dau tren))*.