Perhaps you should try some spelling variations:
van chat » cao chat
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van bac » van ban, van bao, van hac
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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 ((ma hoi) OR (mai hoi)). hieu ((van bac) or (van chat)) truc va danh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (mai hoi)). hieu ((van bac) OR (van chat)) truc va danh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (mai hoi)). hieu ((van bac) or (van chat)) truc va danh doi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) OR (mai hoi)). hieu ((van bac) or (van chat)) truc va danh doi cua te*.