Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
dan hanh » dang hanh, dan khanh, dan thanh
nang doc » nang luc
thuc dan » thuc hanh, hoc dan, thuc vat
doi cua » dai cua, hoi cua
ve pham » vi pham, v pham, ve phan
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
doc hoi » duoc hoi, hoc hoi, doc hai
sac ky » cac ky, sai ky
te cua » tue cua, le cua, de cua

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 ky) or (sac ky)) nang doc hoi. hieu ve pham thuc dan hanh ((doi cua) or (te cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang doc hoi. hieu ve pham thuc dan hanh ((doi cua) OR (te cua)) te.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang doc hoi. hieu ve pham thuc dan hanh ((doi cua) or (te cua)) te*.