Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
su viet » so viet
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
va cam » va cham, va cac, va cao
v nang » va nang, vu nang, van nang
ve cam » ve cham, ve cac, ve cai

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 (v nang)) ma hoi. hieu ((ve cam) or (va cam)) truc va thanh va su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) ma hoi. hieu ((ve cam) OR (va cam)) truc va thanh va su viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) ma hoi. hieu ((ve cam) or (va cam)) truc va thanh va su viet*.