Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
va hang » van hang, va nang, va lang
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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