Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
danh tai » doanh tai, dinh tai, hanh tai
van cac » van hac, van cau, van bac
van hau » van ha, van hai, van dau
va danh » va dinh, va dan, va hanh
cuc te » cua te, cuc thue, cuc tieu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuat sach)) ky nang x hoi. thien ((van cac) or (van hau)) nuoc va danh tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang x hoi. thien ((van cac) OR (van hau)) nuoc va danh tai cuc te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ky nang x hoi. thien ((van cac) or (van hau)) nuoc va danh tai cuc te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ky nang x hoi. thien ((van cac) or (van hau)) nuoc va danh tai cuc te*.