Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
kho tang » cao tang
te sach » toc sach
tinh vi » tinh voi, tinh va, dinh vi
lua tre » cua tre, luy tre, dua tren
cam duc » cam xuc, cao duc, pham duc
tang xa » trang xa, tang ma, lang xa
su sach » so sach, vu sach
va cam » va cham, va cac, va cao

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 (su sach)) kho tang xa hoi. lieu va cam duc va ((tinh vi) OR (trinh vi)) lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (su sach)) kho tang xa hoi. lieu va cam duc va ((tinh vi) OR (trinh vi)) lua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (su sach)) kho tang xa hoi. lieu va cam duc va ((tinh vi) OR (trinh vi)) lua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (su sach)) kho tang xa hoi. lieu va cam duc va ((tinh vi) OR (trinh vi)) lua tre*.