Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
hieu van » hieu va, thien van, lieu va
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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: hoc sach ky lang xa hoi. ((hieu ve) or (hieu van)) cam duc van ((thanh vi) OR (thanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cam duc van ((thanh vi) OR (thanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky lang xa hoi. ((hieu ve) or (hieu van)) cam duc van ((thanh vi) OR (thanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. ((hieu ve) or (hieu van)) cam duc van ((thanh vi) OR (thanh va)) cua te*.