Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
lang tai » lang thai, hang tai, tang tai
tai cua » thai cua, tai cuc, tri cua
nang ma » tang ma, sang ma, nang cao
va lang » va nang, hoa lang
vien da » vien dai
tuc va » thuc va, truc va, tuc xa
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: ((thuoc sach) OR (hoc sach)) ky nang ma hoa. hieu ((hien dai) or (vien da)) tuc va lang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky nang ma hoa. hieu ((hien dai) OR (vien da)) tuc va lang tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky nang ma hoa. hieu ((hien dai) or (vien da)) tuc va lang tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky nang ma hoa. hieu ((hien dai) or (vien da)) tuc va lang tai cua te*.