Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thu sac » thu sach, thu san, thu xac
nang co » nang cao, nang doc, nang noi
nang ra » nang ma, lang ra, nang ro
tuc van » thuc van, truc van, tuc va
sac ky » cac ky, sai ky
qua ca » qua cac, qua cua, qua cai
ca tuc » cua tuc, va tuc
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky ((nang co) or (nang ra)) hoi. hieu qua ca tuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang co) OR (nang ra)) hoi. hieu qua ca tuc van hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang co) or (nang ra)) hoi. hieu qua ca tuc van hanh vi cua te*.