Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
truc va » thuc va, thuc vat, trung va
su tien » su kien, su hien, tu tieng
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: su sach ky nang mai hoi. lieu va cac ((duc va) or (truc va)) hanh vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang mai hoi. lieu va cac ((duc va) OR (truc va)) hanh vi su tien.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang mai hoi. lieu va cac ((duc va) or (truc va)) hanh vi su tien*.