Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
su triet » su viet, su tien, ve triet
cham xuc » cam xuc, chat xuc, cham soc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi su » va su, ve su, ki su

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) or (thuat sach)) ky sang ((ma hoi) or (mai hoi)). hieu ve cham xuc va dan vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky sang ((ma hoi) OR (mai hoi)). hieu ve cham xuc va dan vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky sang ((ma hoi) or (mai hoi)). hieu ve cham xuc va dan vi su triet*.