Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tuc cham » toc cham, phuc cham, thuc chan
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
tu cham » toc cham, thi cham
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
doc va » duoc va, hoc va, duc va
de cau » ke cau, le cau, ve cau

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 (thu hoach)) ky nang xa hoi. hieu ((tuc cham) OR (tu cham)) doc va hanh de cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu hoach)) ky nang xa hoi. hieu ((tuc cham) OR (tu cham)) doc va hanh de cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thu hoach)) ky nang xa hoi. hieu ((tuc cham) OR (tu cham)) doc va hanh de cau tren".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu hoach)) ky nang xa hoi. hieu ((tuc cham) OR (tu cham)) doc va hanh de cau tren*.