Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
cam thuc » am thuc, nam thuc, cam thu
cua tre » cua te, cuu tre, dua tren
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
ha hoi » ha noi, xa hoi, va hoi

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 dang ((ha hoi) OR (hoa hoi)). hieu ve cam thuc va thanh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((ha hoi) OR (hoa hoi)). hieu ve cam thuc va thanh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((ha hoi) OR (hoa hoi)). hieu ve cam thuc va thanh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((ha hoi) OR (hoa hoi)). hieu ve cam thuc va thanh va ((cua tre) or (cua triet))*.