Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
lanh day » lanh dao, lanh lay, danh dau
cham luc » cham soc, nhan luc, cham cuu
va lanh » va lang, va danh, va hanh
te sach » toc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
y tang » ky tang, 6 tang, 5 tang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
7 tang » 6 tang

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 (7 tang)) ma hoi. hieu ve cham luc va lanh day ((su triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y tang) OR (7 tang)) ma hoi. hieu ve cham luc va lanh day ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y tang) or (7 tang)) ma hoi. hieu ve cham luc va lanh day ((su triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((y tang) or (7 tang)) ma hoi. hieu ve cham luc va lanh day ((su triet) OR (ve triet))*.