Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
dan hanh » dang hanh, dan khanh, ban hanh
nang ma » tang ma, sang ma, nang cao
vu sac » vu sach, vu san, va sac
vi cua » vai cua, di cua
he nam » ha nam, nghe nam
sac ky » cac ky, sai ky
ve nam » va nam, le nam, te nam
ma hoi » mai hoi, xa hoi, ma hoa
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: vu sac ky nang ma hoi. hieu ((ve nam) or (he nam)) hoc ((dan hanh) OR (dan thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ma hoi. hieu ((ve nam) OR (he nam)) hoc ((dan hanh) OR (dan thanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang ma hoi. hieu ((ve nam) or (he nam)) hoc ((dan hanh) OR (dan thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ma hoi. hieu ((ve nam) or (he nam)) hoc ((dan hanh) OR (dan thanh)) vi cua te*.