Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
chat duc » chat xuc, chat doc, chet duoc
nang hoa » nang hoat, hang hoa, nang hoc
cua tre » cua te, cua triet, dua tren
duc gia » quoc gia
sach ky » sac ky, sach y, sach kem
va chat » van chat, va phat, cao chat
hoa hoi » khoa hoi, hoa hoc, hoa doi
sach ty » sach y, sach tu, sach thu
cuu tre » cau tren, cau treo

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 ky) or (sach ty)) nang hoa hoi. lieu va chat duc gia thanh vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang hoa hoi. lieu va chat duc gia thanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang hoa hoi. lieu va chat duc gia thanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang hoa hoi. lieu va chat duc gia thanh vi ((cua tre) OR (cuu tre))*.