Perhaps you should try some spelling variations:
tinh cao » tinh lao, tinh chat, tinh cach
tinh cau » trinh cau, sinh cau, tinh ca
ban hanh » ban hang
sach ty » sach y, sach tu, sach thu
soc ban » hoc ban, coc ban, so ban
te sach » toc sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham

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 ty ((nang ma) or (nang x)) hoi. hieu va cham soc ban hanh ((tinh cau) OR (tinh cao)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (nang x)) hoi. hieu va cham soc ban hanh ((tinh cau) OR (tinh cao)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang ma) or (nang x)) hoi. hieu va cham soc ban hanh ((tinh cau) OR (tinh cao)) tren".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) or (nang x)) hoi. hieu va cham soc ban hanh ((tinh cau) OR (tinh cao)) tren*.