Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
sang tao » hang tai
xa hanh » xa thanh, xa khanh, va hanh
va cham » va chat, va tham
bo sach » co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
xuc xa » tuc xa, buc xa
dai su » dai sua, dai so, dan su
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach y ((nang ma) or (sang tao)) hoi. hieu ((va cam) OR (va cham)) xuc xa hanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y ((nang ma) OR (sang tao)) hoi. hieu ((va cam) OR (va cham)) xuc xa hanh dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y ((nang ma) or (sang tao)) hoi. hieu ((va cam) OR (va cham)) xuc xa hanh dai su triet".
• Adding a wildcard symbol may retrieve word variants: bo sach y ((nang ma) or (sang tao)) hoi. hieu ((va cam) OR (va cham)) xuc xa hanh dai su triet*.