Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va lang » va nang, hoa lang
moc va » hoc va, loc va, doc va
de cua » le cua, te cua, dieu cua
di cu » di cau, di cua, di du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky nang xa hoi. thien van nam moc va lang ((di cu) or (de cua)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. thien van nam moc va lang ((di cu) OR (de cua)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang xa hoi. thien van nam moc va lang ((di cu) or (de cua)) tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang xa hoi. thien van nam moc va lang ((di cu) or (de cua)) tren*.