Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
van cau » van dau, van hau, van chat
danh vi » hanh vi, dinh vi, danh di
hoc anh » hoc nhanh, ngoc anh, hoc sinh
ma hoi » mai hoi, xa hoi, ma hoa
luc va » tuc va, loc va
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc anh) OR (hoc nganh)) ky nang ma hoi. hieu van cau ((luc va) or (duc va)) danh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc anh) OR (hoc nganh)) ky nang ma hoi. hieu van cau ((luc va) OR (duc va)) danh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc anh) OR (hoc nganh)) ky nang ma hoi. hieu van cau ((luc va) or (duc va)) danh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: ((hoc anh) OR (hoc nganh)) ky nang ma hoi. hieu van cau ((luc va) or (duc va)) danh vi cau tren*.