Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang tai » hang va, dung tai
nang dau » hang dau, xang dau, nang du
cuu tre » cua tre, cau tren, cau treo
va hang » van hang, va nang, va lang
cam tuc » cam xuc, cam tu, nam thuc
sach ky » sac ky, sach y, sach kem
dau hoi » cau hoi, dai hoi, dan hoi
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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 ky) or (sach ty)) nang dau hoi. hieu ve cam tuc va hang tai ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang dau hoi. hieu ve cam tuc va hang tai ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang dau hoi. hieu ve cam tuc va hang tai ((cuu tre) or (cua triet))*.