Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
te sach » toc sach
ky tang » ky nang, ky dang, kho tang
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va lanh » va lang, va danh, va hanh
dao cua » day cua, dan cua, do cua
y tang » 6 tang, 7 tang, 5 tang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y tang) or (ky tang)) ma hoi. hieu vu cham luc va lanh ((dao cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y tang) OR (ky tang)) ma hoi. hieu vu cham luc va lanh ((dao cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y tang) or (ky tang)) ma hoi. hieu vu cham luc va lanh ((dao cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((y tang) or (ky tang)) ma hoi. hieu vu cham luc va lanh ((dao cua) OR (dai cua)) triet*.