Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (te sach)) y nang xa hoi. hieu vu kham ((luc van) OR (luu van)) hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) y nang xa hoi. hieu vu kham ((luc van) OR (luu van)) hanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) y nang xa hoi. hieu vu kham ((luc van) OR (luu van)) hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) y nang xa hoi. hieu vu kham ((luc van) OR (luu van)) hanh va su triet*.