Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
qua cam » qua cham, qua cac, qua ca
tinh da » tinh va, tinh gia, tinh lao
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, duc va
da cua » dai cua, day cua, dan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ky nang)) ma hoi. hieu qua cam ((tuc va) OR (tuc xa)) tinh da cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) ma hoi. hieu qua cam ((tuc va) OR (tuc xa)) tinh da cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ky nang)) ma hoi. hieu qua cam ((tuc va) OR (tuc xa)) tinh da cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ky nang)) ma hoi. hieu qua cam ((tuc va) OR (tuc xa)) tinh da cua triet*.