Perhaps you should try some spelling variations:
sach thieue » sach thue
thien van » thi van
cam thuc » am thuc, nam thuc, cam thu
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
dau hai » dai hai, dau ha, cau hai
hai cua » thai cua, dai cua, hoi cua
va dau » va dao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach thieu) or (sach thieue)) nang xa hoi. thien van cam thuc va dau hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thieu) OR (sach thieue)) nang xa hoi. thien van cam thuc va dau hai cua te.
• Adding a wildcard symbol may retrieve word variants: thu ((sach thieu) or (sach thieue)) nang xa hoi. thien van cam thuc va dau hai cua te*.