Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
tham tuc » thai tuc, nham thuc, pham thuc
dinh hai » dinh thai, tinh hai, dinh ha
hai cua » thai cua, dai cua, hoi cua
va dinh » van dinh, va kinh, va tinh
thu sac » thu sach, thu san, thu dac
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
thu xac » thau xay
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: ((thu sac) or (thu xac)) ky nang ma hoa. hieu va ((tham tuc) OR (tham thuc)) va dinh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu xac)) ky nang ma hoa. hieu va ((tham tuc) OR (tham thuc)) va dinh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu xac)) ky nang ma hoa. hieu va ((tham tuc) OR (tham thuc)) va dinh hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) or (thu xac)) ky nang ma hoa. hieu va ((tham tuc) OR (tham thuc)) va dinh hai cua te*.