Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
su viet » so viet
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) or (hoc sinh)) ky lang van hoi. hieu qua cac xuc ((va hanh) or (va dinh)) vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (hoc sinh)) ky lang van hoi. hieu qua cac xuc ((va hanh) OR (va dinh)) vi su viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (hoc sinh)) ky lang van hoi. hieu qua cac xuc ((va hanh) or (va dinh)) vi su viet*.