Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
kho tang » cao tang
ve triet » va trien, su triet
ky tang » ky nang, ky dang, ky trong
cam duc » cam xuc, cao duc, pham duc
hang di » hang doi, hang vi, hang dien
hieu va » lieu va, hieu qua
ho hoi » hoc hoi, hoa hoi, hoi hoi
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((ky tang) OR (kho tang)) ho hoi. hieu va cam duc va ((hanh kem) or (hang di)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ky tang) OR (kho tang)) ho hoi. hieu va cam duc va ((hanh kem) OR (hang di)) ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ky tang) OR (kho tang)) ho hoi. hieu va cam duc va ((hanh kem) or (hang di)) ve triet*".