Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
cua viet » ca viet, hoa viet, cua vat
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, cua tu, cua thuoc
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ca tuc » va tuc
sac ky » cac ky, sai ky
va cua » va chua, via cua, ca cua

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 ky) or (sac ky)) nang ma hoi. thieu bien ((ca tuc) OR (cua tuc)) va hanh va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang ma hoi. thieu bien ((ca tuc) OR (cua tuc)) va hanh va cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) nang ma hoi. thieu bien ((ca tuc) OR (cua tuc)) va hanh va cua viet*".