Perhaps you should try some spelling variations:
thuat nganh » thuat lanh, thuat canh, luat nganh
nganh ky » nganh y, nganh xay, hanh ky
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
van hac » van hoc, van ha, van hai
hac dat » hoc dat, tac dat, hoach dat
dat van » dao van, dat va, dam van
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 nganh ky ((nang ma) OR (sang ma)) hoi. hieu van hac dat van hanh vi cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat nganh ky ((nang ma) OR (sang ma)) hoi. hieu van hac dat van hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thuat nganh ky ((nang ma) OR (sang ma)) hoi. hieu van hac dat van hanh vi cua vat*.