Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
kham luc » khai luoc, kham cuoc, nhan luc
su triet » su viet, su tien, ve triet
nang xa » lang xa, nang ma, mang xa
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
te sach » toc sach
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi

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) OR (nang x)) hoi. hieu vu kham luc 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) OR (nang x)) hoi. hieu vu kham luc 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) OR (nang x)) hoi. hieu vu kham luc van hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) y ((nang xa) OR (nang x)) hoi. hieu vu kham luc van hanh va su triet*.