Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thanh lai » thanh hai, thanh lap, thanh loi
thuc gia » thuc giai, thue gia, thuc dia
cam thuc » am thuc, nam thuc, cam thu
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ty nang xa hoi. hieu ve cam thuc gia thanh lai ((cua tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang xa hoi. hieu ve cam thuc gia thanh lai ((cua tre) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang xa hoi. hieu ve cam thuc gia thanh lai ((cua tre) or (cau triet))*.