Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thai cua » than cua, tai cuc, dai cua
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ky nang xa hoi. hieu ve cam duc va hanh ((thai cua) OR (tri cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky nang xa hoi. hieu ve cam duc va hanh ((thai cua) OR (tri cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ky nang xa hoi. hieu ve cam duc va hanh ((thai cua) OR (tri cua)) viet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky nang xa hoi. hieu ve cam duc va hanh ((thai cua) OR (tri cua)) viet*.