Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
ve triet » va trien, su triet
su sach » so sach, vu sach
thi lan » thi hanh, thi nang, thi lien
hieu ve » hieu va, hieu van
lan xa » lang xa, dan xa, lan ha
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi lan xa hoi. hieu ve am thuc van hanh lai ((ve triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi lan xa hoi. hieu ve am thuc van hanh lai ((ve triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: su sach thi lan xa hoi. hieu ve am thuc van hanh lai ((ve triet) or (hoa viet))*.