Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
lanh ky » hanh ky, thanh ky, lanh lay
nang ma » tang ma, sang ma, nang cao
van tac » van thac, van tai, van tan
tac dat » tac da, tac dao, tac dau
dat van » dao van, dat va, dam van
ma hoi » mai hoi, xa hoi, ma hoa
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: thuat ((lanh ky) or (nganh ky)) nang ma hoi. hieu van tac dat van hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((lanh ky) OR (nganh ky)) nang ma hoi. hieu van tac dat van hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thuat ((lanh ky) or (nganh ky)) nang ma hoi. hieu van tac dat van hanh vi cua vat*.