Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cau dat » cai dat, cau hat, chap dat
hieu va » lieu va, hieu qua
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
sac ky » cac ky
va cau » van cau, va cac, va dau
vi cua » vai cua, di cua

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) or (sai ky)) ((nang ma) OR (sang ma)) hoi. hieu va cau dat va thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (sai ky)) ((nang ma) OR (sang ma)) hoi. hieu va cau dat va thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (sai ky)) ((nang ma) OR (sang ma)) hoi. hieu va cau dat va thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (sai ky)) ((nang ma) OR (sang ma)) hoi. hieu va cau dat va thanh vi cua vat*.