Perhaps you should try some spelling variations:
can hanh » ban hanh, van hanh, dan hanh
luoc can » luc canh, hoc can, luoc dai
su sach » so sach, vu sach
va chat » van chat, va phat, cao chat
va cham » va tham
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang xa) or (nang ma)) hoi. lieu ((va cham) or (va chat)) luoc can hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang ma)) hoi. lieu ((va cham) OR (va chat)) luoc can hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang ma)) hoi. lieu ((va cham) or (va chat)) luoc can hanh vi cua tu*.