Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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: doc sach ((ty nang) OR (ty hang)) ma hoi. hieu ve cam xuc ((van hanh) or (ban hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((ty nang) OR (ty hang)) ma hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((ty nang) OR (ty hang)) ma hoi. hieu ve cam xuc ((van hanh) or (ban hanh)) vi cua te*".